J. deWeese, Manuel Santana Palacios, Anastasia Belikow, A. El-geneidy
Express buses—characterized by limited stops and sometimes higher frequencies or priority traffic measures—offer a cost-effective and efficient way to boost service convenience and reliability for riders. This paper assesses how the accessibility benefits of express bus route policy are distributed in Montreal, Canada, while providing a pathway for public transportation agencies to assess their policies and plans. To isolate the impact of bus express routes, we use General Transit Speed Specification (GTFS) data, the Open Trip Planner multimodal routing engine, and the 2013 edition of Montreal’s origin-destination survey to contrast travel time and accessibility at the trip and census-tract levels under two scenarios: one with the existing, complete network and the second a counterfactual scenario with no express bus routes. Our results indicate that bus express routes enable an overall increase in accessibility for the overall population. However, the accessibility benefits do not accrue evenly, as expected, but also tend to benefit a more significant number of higher incomes. This occurs despite the location of low-income populations in some outlying areas of the city, which express bus routes are supposed to serve. This paper closes with policy recommendations that help planners balance economic, environmental, and equity goals, perhaps one of the most complex challenges they face nowadays.
{"title":"Whose express access? Assessing the equity implications of bus express routes in Montreal, Canada","authors":"J. deWeese, Manuel Santana Palacios, Anastasia Belikow, A. El-geneidy","doi":"10.5198/jtlu.2022.1879","DOIUrl":"https://doi.org/10.5198/jtlu.2022.1879","url":null,"abstract":"Express buses—characterized by limited stops and sometimes higher frequencies or priority traffic measures—offer a cost-effective and efficient way to boost service convenience and reliability for riders. This paper assesses how the accessibility benefits of express bus route policy are distributed in Montreal, Canada, while providing a pathway for public transportation agencies to assess their policies and plans. To isolate the impact of bus express routes, we use General Transit Speed Specification (GTFS) data, the Open Trip Planner multimodal routing engine, and the 2013 edition of Montreal’s origin-destination survey to contrast travel time and accessibility at the trip and census-tract levels under two scenarios: one with the existing, complete network and the second a counterfactual scenario with no express bus routes. Our results indicate that bus express routes enable an overall increase in accessibility for the overall population. However, the accessibility benefits do not accrue evenly, as expected, but also tend to benefit a more significant number of higher incomes. This occurs despite the location of low-income populations in some outlying areas of the city, which express bus routes are supposed to serve. This paper closes with policy recommendations that help planners balance economic, environmental, and equity goals, perhaps one of the most complex challenges they face nowadays.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49435677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yongling Li, S. Geertman, Yanliu Lin, P. Hooimeijer, W. Xu, Jie Huang
Studies have found that spatial mismatch is a universal phenomenon, although both their substantive and methodological focus can differ substantially. In China, there is a growing body of literature on spatial mismatch, but few studies have measured the degree of spatial mismatch between local and migrant workers in different occupations. To fill this gap, this research investigates the spatial mismatch for different socioeconomic groups in Xiamen according to their “hukou” status and occupation. As one of the country’s first four special economic zones, Xiamen achieved housing marketization earlier than most other Chinese cities, attracting a large amount of capital and migrants, and shaping different spatial patterns of local workers and migrant workers. The findings show that blue-collar, pink-collar, and white-collar workers, who are further categorized as either locals or migrants, experience varying degrees of job accessibility and spatial mismatch. In addition, even though migrant workers experience less spatial mismatch, they still have disadvantages in terms of commuting time due to their travel mode. The results presented in this paper are helpful for understanding the spatial mismatch for various social groups and facilitating sustainable mobility and social equity.
{"title":"Spatial mismatch for distinct socioeconomic groups in Xiamen, China","authors":"Yongling Li, S. Geertman, Yanliu Lin, P. Hooimeijer, W. Xu, Jie Huang","doi":"10.5198/jtlu.2022.1884","DOIUrl":"https://doi.org/10.5198/jtlu.2022.1884","url":null,"abstract":"Studies have found that spatial mismatch is a universal phenomenon, although both their substantive and methodological focus can differ substantially. In China, there is a growing body of literature on spatial mismatch, but few studies have measured the degree of spatial mismatch between local and migrant workers in different occupations. To fill this gap, this research investigates the spatial mismatch for different socioeconomic groups in Xiamen according to their “hukou” status and occupation. As one of the country’s first four special economic zones, Xiamen achieved housing marketization earlier than most other Chinese cities, attracting a large amount of capital and migrants, and shaping different spatial patterns of local workers and migrant workers. The findings show that blue-collar, pink-collar, and white-collar workers, who are further categorized as either locals or migrants, experience varying degrees of job accessibility and spatial mismatch. In addition, even though migrant workers experience less spatial mismatch, they still have disadvantages in terms of commuting time due to their travel mode. The results presented in this paper are helpful for understanding the spatial mismatch for various social groups and facilitating sustainable mobility and social equity.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49552224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Accessibility and equality evaluations have been primarily focused on residential location. However, workplace location might be an equivalent contributor to inequalities in the travel experience and accessibility. Traditionally, transport planning connects high-demand areas with the best-quality and capacity transport infrastructures. Literature supports that employment centers (EC) receive mainly workers in certain middle-to high-income occupations. This condition results in a type of segregation pattern associated with trip destinations and modal choice similar to those reported for the household location. This paper investigates commuting from a different standpoint, emphasizing the need to consider workplace location and employment distribution within cities. We identify five main EC in Bogotá, Colombia, and explore their association with the commuting mode choice of three population groups using mixed logit models. Results indicate that people who work in any EC tend to use more public transport (PT). Nevertheless, the probability of selecting PT differs among groups. Specifically, for low-income commuters, PT represents lower utility than that for middle-income commuters if their job is located in an EC. The fact that the population most likely to be public transport captive does not find this alternative as attractive as the middle-income segment needs further investigation for better policymaking.
{"title":"Which dots to connect? Employment centers and commuting inequalities in Bogotá","authors":"J. Peña, L. Guzman, J. Arellana","doi":"10.5198/jtlu.2022.2100","DOIUrl":"https://doi.org/10.5198/jtlu.2022.2100","url":null,"abstract":"Accessibility and equality evaluations have been primarily focused on residential location. However, workplace location might be an equivalent contributor to inequalities in the travel experience and accessibility. Traditionally, transport planning connects high-demand areas with the best-quality and capacity transport infrastructures. Literature supports that employment centers (EC) receive mainly workers in certain middle-to high-income occupations. This condition results in a type of segregation pattern associated with trip destinations and modal choice similar to those reported for the household location. This paper investigates commuting from a different standpoint, emphasizing the need to consider workplace location and employment distribution within cities. We identify five main EC in Bogotá, Colombia, and explore their association with the commuting mode choice of three population groups using mixed logit models. Results indicate that people who work in any EC tend to use more public transport (PT). Nevertheless, the probability of selecting PT differs among groups. Specifically, for low-income commuters, PT represents lower utility than that for middle-income commuters if their job is located in an EC. The fact that the population most likely to be public transport captive does not find this alternative as attractive as the middle-income segment needs further investigation for better policymaking.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48649940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, we advanced pedestrian travel monitoring using a novel data source: pedestrian push-button presses obtained from archived traffic signal controller logs at more than 1,500 signalized intersections in Utah over one year. The purposes of this study were to: (1) quantify pedestrian activity patterns; (2) create factor groups and expansion/adjustment factors from these temporal patterns; and (3) explore relationships between patterns and spatial characteristics. Using empirical clustering, we classified signals into five groups, based on normalized hourly/weekly counts (each hour’s proportion of weekly totals, or the inverse of the expansion factors), and three clusters with similar monthly adjustment factors. We also used multinomial logit models to identify spatial characteristics (land use, built environment, socio-economic characteristics, and climatic regions) associated with different temporal patterns. For example, we found that signals near schools were much more likely to have bimodal daily peak hours and lower pedestrian activity during out-of-school months. Despite these good results, our hourly/weekday patterns differed less than in past research, highlighting the limits of existing infrastructure for capturing all kinds of activity patterns. Nevertheless, we demonstrated that signals with push-button data are a useful supplement to existing permanent counters within a broader pedestrian traffic monitoring program.
{"title":"Advances in pedestrian travel monitoring: Temporal patterns and spatial characteristics using pedestrian push-button data from Utah traffic signals","authors":"Prasanna Humagain, P. Singleton","doi":"10.5198/jtlu.2021.2112","DOIUrl":"https://doi.org/10.5198/jtlu.2021.2112","url":null,"abstract":"In this study, we advanced pedestrian travel monitoring using a novel data source: pedestrian push-button presses obtained from archived traffic signal controller logs at more than 1,500 signalized intersections in Utah over one year. The purposes of this study were to: (1) quantify pedestrian activity patterns; (2) create factor groups and expansion/adjustment factors from these temporal patterns; and (3) explore relationships between patterns and spatial characteristics. Using empirical clustering, we classified signals into five groups, based on normalized hourly/weekly counts (each hour’s proportion of weekly totals, or the inverse of the expansion factors), and three clusters with similar monthly adjustment factors. We also used multinomial logit models to identify spatial characteristics (land use, built environment, socio-economic characteristics, and climatic regions) associated with different temporal patterns. For example, we found that signals near schools were much more likely to have bimodal daily peak hours and lower pedestrian activity during out-of-school months. Despite these good results, our hourly/weekday patterns differed less than in past research, highlighting the limits of existing infrastructure for capturing all kinds of activity patterns. Nevertheless, we demonstrated that signals with push-button data are a useful supplement to existing permanent counters within a broader pedestrian traffic monitoring program.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43917966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With regard to public policy for public transport services, two dominant approaches are found: the provision of minimal services to the car-less population, or the provision of a service that competes directly with the car (in terms of time, cost, convenience, etc.). Increased acknowledgement of the need to mitigate traffic growth and reduce greenhouse gas (GHG) emissions has led to a growing need to shift from the former to the latter, encouraging the use of public transport. This paper sets out to explore whether competitiveness with the car is a priority for the public transport planning of medium-sized European cities, as well as whether the change in European regulation (European Commission, 2007) has managed to contribute to the acceptance of this priority. In this study, we take a closer look at a country undergoing significant regulatory and procedural transformations. An exploratory analysis is conducted regarding plans, actions, and development projects in recent years in four Portuguese municipalities. Relevant planners and transport authorities are interviewed on matters such as how local policies and plans favor public transport; how the planning process was implemented; the actors involved; and the support tools used to achieve the established goals. The findings reveal that relative competitiveness of public transport is considered important by planning practitioners. Nevertheless, other concerns seem to be more timely, such as, providing minimal services, restructuring existing networks, and budget constraints. The results suggest that changes in the planning process have been overwhelming and are seen as restricting the steps required toward making public transport more competitive vis-à-vis the car. So far, local authorities recognize the potential of adding relative competitiveness concerns in the future, as well as the added value of planning support tools capable of revealing such relative competitiveness.
{"title":"Public transport strategy: Minimal service vs. competitor to the car","authors":"Cecília Silva, Catarina Cadima, Nayanne Castro, Aud Tennøy","doi":"10.5198/jtlu.2021.1982","DOIUrl":"https://doi.org/10.5198/jtlu.2021.1982","url":null,"abstract":"With regard to public policy for public transport services, two dominant approaches are found: the provision of minimal services to the car-less population, or the provision of a service that competes directly with the car (in terms of time, cost, convenience, etc.). Increased acknowledgement of the need to mitigate traffic growth and reduce greenhouse gas (GHG) emissions has led to a growing need to shift from the former to the latter, encouraging the use of public transport.\u0000This paper sets out to explore whether competitiveness with the car is a priority for the public transport planning of medium-sized European cities, as well as whether the change in European regulation (European Commission, 2007) has managed to contribute to the acceptance of this priority. In this study, we take a closer look at a country undergoing significant regulatory and procedural transformations. An exploratory analysis is conducted regarding plans, actions, and development projects in recent years in four Portuguese municipalities. Relevant planners and transport authorities are interviewed on matters such as how local policies and plans favor public transport; how the planning process was implemented; the actors involved; and the support tools used to achieve the established goals.\u0000The findings reveal that relative competitiveness of public transport is considered important by planning practitioners. Nevertheless, other concerns seem to be more timely, such as, providing minimal services, restructuring existing networks, and budget constraints. The results suggest that changes in the planning process have been overwhelming and are seen as restricting the steps required toward making public transport more competitive vis-à-vis the car. So far, local authorities recognize the potential of adding relative competitiveness concerns in the future, as well as the added value of planning support tools capable of revealing such relative competitiveness.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44608263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To promote sustainable urban development, transport policies need to change from a car-oriented mobility planning paradigm to an accessibility-based paradigm, integrating land-use and transport policies. This paper uses the concept of planning paradigms to describe the current status of municipal transport planning and problem framing. The dominant transport planning paradigm of 172 Dutch municipalities is determined, based on a conceptual framework with 24 mobility and accessibility planning criteria. Statistical analysis is then conducted to find linkages between the planning paradigm and transport, land-use, and institutional characteristics of the municipalities. We show that the mobility planning paradigm still dominates Dutch municipal transport planning, and the accessibility planning paradigm is mostly found in large cities and highly urban municipalities. However, we do find indications of slow change in the transport planning paradigms in Dutch municipalities, as older policy documents are more (car) mobility focused than newer policy documents. Further research is necessary to examine the evolution of the paradigm shift in municipal transport planning over time and what factors promote the realization of such a paradigm shift.
{"title":"Mobility and accessibility paradigms in Dutch policies: An empirical analysis","authors":"R. Akse, T. Thomas, K. Geurs","doi":"10.5198/jtlu.2021.2097","DOIUrl":"https://doi.org/10.5198/jtlu.2021.2097","url":null,"abstract":"To promote sustainable urban development, transport policies need to change from a car-oriented mobility planning paradigm to an accessibility-based paradigm, integrating land-use and transport policies. This paper uses the concept of planning paradigms to describe the current status of municipal transport planning and problem framing. The dominant transport planning paradigm of 172 Dutch municipalities is determined, based on a conceptual framework with 24 mobility and accessibility planning criteria. Statistical analysis is then conducted to find linkages between the planning paradigm and transport, land-use, and institutional characteristics of the municipalities. We show that the mobility planning paradigm still dominates Dutch municipal transport planning, and the accessibility planning paradigm is mostly found in large cities and highly urban municipalities. However, we do find indications of slow change in the transport planning paradigms in Dutch municipalities, as older policy documents are more (car) mobility focused than newer policy documents. Further research is necessary to examine the evolution of the paradigm shift in municipal transport planning over time and what factors promote the realization of such a paradigm shift.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47631370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Home location choice is based on both the characteristics of the dwelling (e.g., size, style, number of bedrooms) and the location (e.g., proximity to work, quality of schools, accessibility). Recent years have seen a steep increase in the price of housing in many major cities. In this research, we examine how these price increases are affecting the types of dwelling and locations considered by households. A large sample of real estate listings from 2006 and 2016 from the Greater Toronto Area is used to develop the empirical models. Two recently developed discrete choice models are used in the study: a nested logit model with latent class feedback (LCF) and a semi-compensatory independent availability logit (SCIAL) model. A method of alternative aggregation is proposed to overcome the computational hurdle that often impedes the estimation of choice set models. We find a significant increase in the probability of larger households considering townhouses and apartments over detached single-family dwellings between 2006 and 2016.
{"title":"The evolution of choice set formation in dwelling and location with rising prices: A decadal panel analysis in the Greater Toronto Area","authors":"Jason Hawkins, Khandker Nurul Habib","doi":"10.5198/jtlu.2021.1854","DOIUrl":"https://doi.org/10.5198/jtlu.2021.1854","url":null,"abstract":"Home location choice is based on both the characteristics of the dwelling (e.g., size, style, number of bedrooms) and the location (e.g., proximity to work, quality of schools, accessibility). Recent years have seen a steep increase in the price of housing in many major cities. In this research, we examine how these price increases are affecting the types of dwelling and locations considered by households. A large sample of real estate listings from 2006 and 2016 from the Greater Toronto Area is used to develop the empirical models. Two recently developed discrete choice models are used in the study: a nested logit model with latent class feedback (LCF) and a semi-compensatory independent availability logit (SCIAL) model. A method of alternative aggregation is proposed to overcome the computational hurdle that often impedes the estimation of choice set models. We find a significant increase in the probability of larger households considering townhouses and apartments over detached single-family dwellings between 2006 and 2016.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46765576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study develops vehicular and non-vehicular trip generation models for mid-rise, multi-family residential developments. A comparative analysis of observed and Instiutue of Transportation Engineers (ITE) trip rates suggests that ITE rates consistently overestimate. A latent segmentation-based negative binomial (LSNB) model is developed to improve the methodology for estimating vehicular and non-vehicular trips. One of the key features of an LSNB model is to capture heterogeneity. Segment allocation results for the vehicular and non-vehicular models suggest that one segment includes suburban developments, whereas the other includes urban developments. Results reveal that a higher number of dwelling units is likely to be associated with increased vehicle trips. For non-vehicular trips, a higher number of dwelling units and increased recreational opportunities are more likely to increase trip generation. The LSNB model confirms the existence of significant heterogeneity. For instance, higher land-use mix has a higher probability to deter vehicular trips in urban areas, whereas trips in the suburban areas are likely to continue increasing. Higher density of bus routes and sidewalks are likely to be associated with increased non-vehicular trips in urban areas, yet such trips are likely to decrease in suburban areas. An interesting finding is that higher bikeability in suburban areas is more likely to increase non-vehicular trips. The findings of this study are expected to assist engineers and planners to predict vehicular and non-vehicular trips with higher accuracy.
{"title":"Developing vehicular and non-vehicular trip generation models for mid-rise residential buildings in Kelowna, British Columbia: Assessing the impact of built environment, land use, and neighborhood characteristics","authors":"M. Orvin, Daryus Ahmed, M. Fatmi, G. Lovegrove","doi":"10.5198/jtlu.2021.1872","DOIUrl":"https://doi.org/10.5198/jtlu.2021.1872","url":null,"abstract":"This study develops vehicular and non-vehicular trip generation models for mid-rise, multi-family residential developments. A comparative analysis of observed and Instiutue of Transportation Engineers (ITE) trip rates suggests that ITE rates consistently overestimate. A latent segmentation-based negative binomial (LSNB) model is developed to improve the methodology for estimating vehicular and non-vehicular trips. One of the key features of an LSNB model is to capture heterogeneity. Segment allocation results for the vehicular and non-vehicular models suggest that one segment includes suburban developments, whereas the other includes urban developments. Results reveal that a higher number of dwelling units is likely to be associated with increased vehicle trips. For non-vehicular trips, a higher number of dwelling units and increased recreational opportunities are more likely to increase trip generation. The LSNB model confirms the existence of significant heterogeneity. For instance, higher land-use mix has a higher probability to deter vehicular trips in urban areas, whereas trips in the suburban areas are likely to continue increasing. Higher density of bus routes and sidewalks are likely to be associated with increased non-vehicular trips in urban areas, yet such trips are likely to decrease in suburban areas. An interesting finding is that higher bikeability in suburban areas is more likely to increase non-vehicular trips. The findings of this study are expected to assist engineers and planners to predict vehicular and non-vehicular trips with higher accuracy.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45913192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Exposure to risk is a theoretically important correlate of crash risk, but many safety performance functions (SPFs) for pedestrian and bicycle traffic have yet to include the mode-specific measures of exposure. When SPFs are used in the systematic approach to assess network-wide crash risk, the omission of the exposure potentially could affect the identification of high-risk locations. Using crash data from Minneapolis, this study constructs and compares two sets of SPFs, one with pedestrian and bicycle exposure variables and the other without, for network-wide intersection and mid-block crash models. Inclusion of mode-specific exposure variables improves model validity and measures of goodness-of-fit and increases accuracy of predictions of pedestrian and bicycle crash risk. Including these exposure variables in the SPFs changes the distribution of high-risk locations, including the proportion of high-risk locations in low-income and racially concentrated areas. These results confirm the importance of incorporating exposure measures within SPFs and the need for pedestrian and bicycle monitoring programs to generate exposure data.
{"title":"The effects of pedestrian and bicycle exposure on crash risk in Minneapolis","authors":"Tao Tao, G. Lindsey, Jason Cao, Jueyu Wang","doi":"10.5198/jtlu.2021.1980","DOIUrl":"https://doi.org/10.5198/jtlu.2021.1980","url":null,"abstract":"Exposure to risk is a theoretically important correlate of crash risk, but many safety performance functions (SPFs) for pedestrian and bicycle traffic have yet to include the mode-specific measures of exposure. When SPFs are used in the systematic approach to assess network-wide crash risk, the omission of the exposure potentially could affect the identification of high-risk locations. Using crash data from Minneapolis, this study constructs and compares two sets of SPFs, one with pedestrian and bicycle exposure variables and the other without, for network-wide intersection and mid-block crash models. Inclusion of mode-specific exposure variables improves model validity and measures of goodness-of-fit and increases accuracy of predictions of pedestrian and bicycle crash risk. Including these exposure variables in the SPFs changes the distribution of high-risk locations, including the proportion of high-risk locations in low-income and racially concentrated areas. These results confirm the importance of incorporating exposure measures within SPFs and the need for pedestrian and bicycle monitoring programs to generate exposure data.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43197716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
During COVID-19 lockdowns, transit agencies need to respond to the decline in travel but also maintain the essential mobility of transit-dependent people. However, there are a few lessons that scholars and practitioners can learn from. Using highway traffic data in the Twin Cities, this study applies a generalized additive model to explore the relationships among the share of low-income population, transit service, and highway traffic during the week that occurred right after the 2020 stay-at-home order. Our results substantiate that transportation impacts are spread unevenly across different income groups and low-income people are less able to reduce travel, leading to equity concerns. Moreover, transit supply influences highway traffic differently in areas with different shares of low-income people. Our study suggests that transportation agencies should provide more affordable travel options for areas with concentrated poverty during lockdowns. In addition, transit agencies should manage transit supply strategically depending on the share of low-income people to better meet people’s mobility needs.
{"title":"Exploring the interaction effect of poverty concentration and transit service on highway traffic during the COVID-19 lockdown","authors":"Tao Tao, Jason Cao","doi":"10.5198/jtlu.2021.1978","DOIUrl":"https://doi.org/10.5198/jtlu.2021.1978","url":null,"abstract":"During COVID-19 lockdowns, transit agencies need to respond to the decline in travel but also maintain the essential mobility of transit-dependent people. However, there are a few lessons that scholars and practitioners can learn from. Using highway traffic data in the Twin Cities, this study applies a generalized additive model to explore the relationships among the share of low-income population, transit service, and highway traffic during the week that occurred right after the 2020 stay-at-home order. Our results substantiate that transportation impacts are spread unevenly across different income groups and low-income people are less able to reduce travel, leading to equity concerns. Moreover, transit supply influences highway traffic differently in areas with different shares of low-income people. Our study suggests that transportation agencies should provide more affordable travel options for areas with concentrated poverty during lockdowns. In addition, transit agencies should manage transit supply strategically depending on the share of low-income people to better meet people’s mobility needs.","PeriodicalId":47271,"journal":{"name":"Journal of Transport and Land Use","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47176180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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