This report provides an easy-to-apply process for use by transportation professionals when estima... more This report provides an easy-to-apply process for use by transportation professionals when estimating vehicular trip generation in built-up urban areas, incorporating the effects of site-specific, local, and area-wide land use and transportation characteristics on estimates of vehicular trip generation for proposed infill development. This process is based on the development and application of mode share and vehicle occupancy adjustment factors applied to conventional trip generation estimates using rates published by the Institute of Transportation Engineers. The study details two ways of deriving the adjustment factors: (1) collecting empirical data from proxy sites located in environments that represent the future context of the project being analyzed; and (2) extracting factors from household travel surveys. The product of this research includes two components: (1) a final report that documents the background, research approach, the development and application of methods to estimate infill trip generation, and a recommended verification approach; and (2) a supplemental technical report that details the application of the household travel survey method. The combination of these two components offers a comprehensive analytical approach and a detailed set of application techniques and requirements to estimate infill development trip generation.
The Institute of Transportation Engineers recently adopted a new recommended practice (RP), “Desi... more The Institute of Transportation Engineers recently adopted a new recommended practice (RP), “Designing Walkable Urban Thoroughfares: A Context Sensitive Approach.” This article provides an overview of the new RP and discusses its benefits. Two case studies of cities that have successfully used the RP for highway realignment and a transit-oriented development projects. The goal of the RP is to bridge the gap between conventional geometric design of streets and highways and design that supports the complex multiple functions of traditional streets. The RP provides a resource for implementing complete streets and a design approach with demonstrated success. Since the RP was developed over a seven-year timeframe with input from hundreds of design professionals, practitioners can have confidence in the validity of the guidance. The RP can be used to design and implement projects to achieve complete streets goals. The ITE and its partners are now working to promote the adoption of the RP as a resource, standard or official guidance for states and municipalities.
Institute of Transportation Engineers Ite Journal, Jun 1, 2009
Current Institute of Transportation Engineers (ITE) trip generation rates are not sufficient to g... more Current Institute of Transportation Engineers (ITE) trip generation rates are not sufficient to guide the approval of proposed developments in urban infill areas because the sources of the rates do not reflect variations in density, land use mix, site design and the multimodal transportation systems of larger metropolitan areas. This paper describes a study that was conducted to develop a methodology for identifying and describing urban infill locations and for collecting trip generation rate data in urban infill areas of California. The study also sought to establish a database of trip generation rates for common infill land use categories in urban areas of California. Trip generation data were generated for several infill land uses, including residential, office, retail, restaurants and hotels. A total of 26 sites were sampled, with intercept surveys conducted during the morning and afternoon peak periods. Data collection efforts were suspended earlier than expected due to budget cutbacks. Because of this, the data collected is not statistically significant. However, the data that were obtained do provide some insight into the differences in travel patterns between urban infill and conventional suburban sites, and can be used to establish the beginning of an urban infill trip generation database. In general, trip generation rates collected in this study were generally lower than ITE trip generation rates.
Transportation planners and traffic engineers are often asked to consider designing narrow reside... more Transportation planners and traffic engineers are often asked to consider designing narrow residential streets or narrowing existing wide residential streets as a measure to reduce speeds. Only one of a litany of traffic calming measures, narrowing streets is almost taken for granted to be an effective method of slowing traffic. In addition to literally reducing the curb-to-curb width through design or retrofit, there are several common ways to physically narrow sections of streets including the installation of chicanes, necked curb returns, and tree planters in parking lanes. Some communities indicate success in "perceptive" narrowing of wide streets through painting edge lines or adding bicycle lanes. When considering narrowing residential streets as a traffic calming measure, it is reasonable to ask the following questions: Is street narrowing alone an effective calming measure? How narrow must the street be to dramatically reduce speeds? What other factors affect resid...
Transit-oriented development (TOD) is a key strategy being used by planning and transportation pr... more Transit-oriented development (TOD) is a key strategy being used by planning and transportation professionals to curb growth, reduce traffic congestion, provide transportation choices, and improve quality of life. TOD alone will not solve our transport problems, but is an important contributor toward this end. This chapter explores TOD from a transportation planner's perspective.
... Does Increased Street Connectivity Improve the Operation of Regional Streets? Case Studies fr... more ... Does Increased Street Connectivity Improve the Operation of Regional Streets? Case Studies from the Portland Metro Regional Street Design Study. by James M. Daisa, PE , Tom Kloster , and Richard Ledbetter pp. 199-207 Purchase Information Permissions for Reuse ...
For the last half century, designers the world over have been under increasing pressure to find w... more For the last half century, designers the world over have been under increasing pressure to find ways to better design urban roads to be compatible with and acceptable to local communities and supportive of transportation and other goals. Recent interest in complete streets, smart growth, and new urbanism have increased the interest in context sensitive roadway design. This paper summarizes the new design guide being developed for a partnership between ITE and the Congress for the New Urbanism. The guide, in the form of an ITE proposed recommended practice, will show principles, criteria, applications and examples of how to design major urban roads (arterials, collectors) within the standard criteria used by most transportation departments. Principal objectives of the guide are to provide for the needed multimodal mobility and safety while at the same time being compatible with and supporting adjoining development and activities. This paper is part of international public outreach to...
Home Contact Us Directory E-Newsletter Follow Us RSS, About TRB. Annual Meeting. Calendar. Commit... more Home Contact Us Directory E-Newsletter Follow Us RSS, About TRB. Annual Meeting. Calendar. Committees & Panels. Programs. Projects. Publications. Resources & Databases. TRID HOME. RECENTLY PUBLISHED. RECENTLY ADDED. ADVANCED SEARCH. ...
This report provides an easy-to-apply process for use by transportation professionals when estima... more This report provides an easy-to-apply process for use by transportation professionals when estimating vehicular trip generation in built-up urban areas, incorporating the effects of site-specific, local, and area-wide land use and transportation characteristics on estimates of vehicular trip generation for proposed infill development. This process is based on the development and application of mode share and vehicle occupancy adjustment factors applied to conventional trip generation estimates using rates published by the Institute of Transportation Engineers. The study details two ways of deriving the adjustment factors: (1) collecting empirical data from proxy sites located in environments that represent the future context of the project being analyzed; and (2) extracting factors from household travel surveys. The product of this research includes two components: (1) a final report that documents the background, research approach, the development and application of methods to estimate infill trip generation, and a recommended verification approach; and (2) a supplemental technical report that details the application of the household travel survey method. The combination of these two components offers a comprehensive analytical approach and a detailed set of application techniques and requirements to estimate infill development trip generation.
The Institute of Transportation Engineers recently adopted a new recommended practice (RP), “Desi... more The Institute of Transportation Engineers recently adopted a new recommended practice (RP), “Designing Walkable Urban Thoroughfares: A Context Sensitive Approach.” This article provides an overview of the new RP and discusses its benefits. Two case studies of cities that have successfully used the RP for highway realignment and a transit-oriented development projects. The goal of the RP is to bridge the gap between conventional geometric design of streets and highways and design that supports the complex multiple functions of traditional streets. The RP provides a resource for implementing complete streets and a design approach with demonstrated success. Since the RP was developed over a seven-year timeframe with input from hundreds of design professionals, practitioners can have confidence in the validity of the guidance. The RP can be used to design and implement projects to achieve complete streets goals. The ITE and its partners are now working to promote the adoption of the RP as a resource, standard or official guidance for states and municipalities.
Institute of Transportation Engineers Ite Journal, Jun 1, 2009
Current Institute of Transportation Engineers (ITE) trip generation rates are not sufficient to g... more Current Institute of Transportation Engineers (ITE) trip generation rates are not sufficient to guide the approval of proposed developments in urban infill areas because the sources of the rates do not reflect variations in density, land use mix, site design and the multimodal transportation systems of larger metropolitan areas. This paper describes a study that was conducted to develop a methodology for identifying and describing urban infill locations and for collecting trip generation rate data in urban infill areas of California. The study also sought to establish a database of trip generation rates for common infill land use categories in urban areas of California. Trip generation data were generated for several infill land uses, including residential, office, retail, restaurants and hotels. A total of 26 sites were sampled, with intercept surveys conducted during the morning and afternoon peak periods. Data collection efforts were suspended earlier than expected due to budget cutbacks. Because of this, the data collected is not statistically significant. However, the data that were obtained do provide some insight into the differences in travel patterns between urban infill and conventional suburban sites, and can be used to establish the beginning of an urban infill trip generation database. In general, trip generation rates collected in this study were generally lower than ITE trip generation rates.
Transportation planners and traffic engineers are often asked to consider designing narrow reside... more Transportation planners and traffic engineers are often asked to consider designing narrow residential streets or narrowing existing wide residential streets as a measure to reduce speeds. Only one of a litany of traffic calming measures, narrowing streets is almost taken for granted to be an effective method of slowing traffic. In addition to literally reducing the curb-to-curb width through design or retrofit, there are several common ways to physically narrow sections of streets including the installation of chicanes, necked curb returns, and tree planters in parking lanes. Some communities indicate success in "perceptive" narrowing of wide streets through painting edge lines or adding bicycle lanes. When considering narrowing residential streets as a traffic calming measure, it is reasonable to ask the following questions: Is street narrowing alone an effective calming measure? How narrow must the street be to dramatically reduce speeds? What other factors affect resid...
Transit-oriented development (TOD) is a key strategy being used by planning and transportation pr... more Transit-oriented development (TOD) is a key strategy being used by planning and transportation professionals to curb growth, reduce traffic congestion, provide transportation choices, and improve quality of life. TOD alone will not solve our transport problems, but is an important contributor toward this end. This chapter explores TOD from a transportation planner's perspective.
... Does Increased Street Connectivity Improve the Operation of Regional Streets? Case Studies fr... more ... Does Increased Street Connectivity Improve the Operation of Regional Streets? Case Studies from the Portland Metro Regional Street Design Study. by James M. Daisa, PE , Tom Kloster , and Richard Ledbetter pp. 199-207 Purchase Information Permissions for Reuse ...
For the last half century, designers the world over have been under increasing pressure to find w... more For the last half century, designers the world over have been under increasing pressure to find ways to better design urban roads to be compatible with and acceptable to local communities and supportive of transportation and other goals. Recent interest in complete streets, smart growth, and new urbanism have increased the interest in context sensitive roadway design. This paper summarizes the new design guide being developed for a partnership between ITE and the Congress for the New Urbanism. The guide, in the form of an ITE proposed recommended practice, will show principles, criteria, applications and examples of how to design major urban roads (arterials, collectors) within the standard criteria used by most transportation departments. Principal objectives of the guide are to provide for the needed multimodal mobility and safety while at the same time being compatible with and supporting adjoining development and activities. This paper is part of international public outreach to...
Home Contact Us Directory E-Newsletter Follow Us RSS, About TRB. Annual Meeting. Calendar. Commit... more Home Contact Us Directory E-Newsletter Follow Us RSS, About TRB. Annual Meeting. Calendar. Committees & Panels. Programs. Projects. Publications. Resources & Databases. TRID HOME. RECENTLY PUBLISHED. RECENTLY ADDED. ADVANCED SEARCH. ...
Uploads
Papers