01026050

Component

https://doi.org/10.3141/1961-04

http://scholar.google.com...nter&publication_year=2006

Low-speed urban streets are designed to provide both access and mobility and to accommodate multiple road users, such as bicyclists and pedestrians. However, speeds on these facilities often exceed the intended operating speeds, as well as their design speeds. Several studies have indicated that the design speed concept, as implemented in the roadway design process in the United States, does not guarantee a consistent alignment promoting uniform operating speeds less than design speeds. A promising design approach to overcome these apparent shortfalls of the design speed approach is a performance-based design procedure with the incorporation of operating speeds. However, this approach requires a clear understanding of the relationships between operating speeds and various road environments. Although numerous previous studies have developed operating-speed models, most of these studies have concentrated on high-speed, rural two-lane highways. In contrast, highway designers and planners have little information about the influence of low-speed urban street environments on drivers’ speeds. This study investigated the relationship between drivers’ speed choices and their associated low-speed urban roadway environments by analyzing second-by-second in-vehicle global positioning system (GPS) data from more than 200 randomly selected vehicles in the Atlanta, Georgia, area. The authors developed operating-speed models for low-speed urban street segments on the bases of roadway alignment, cross-section characteristics, roadside features, and adjacent land uses. The results of this research effort can help highway designers and planners better understand expected operating speeds when they design and evaluate low-speed urban roadways.

01033942

English

pp 24-33

2006

Transportation Research Record: Journal of the Transportation Research Board

0309099706

Print

Figures (1) ; References (39) ; Tables (5)

Alignment; Cross sections; Design speed; Global Positioning System; Land use; Mathematical models; Operating speed; Roadside; Urban highways

Low speed roads

Atlanta (Georgia)

Design; Highways; I20: Design and Planning of Transport Infrastructure

TRIS, TRB, ATRI

Mar 3 2006 11:06AM

• Alternating Passing Lane Lengths
• Daytime High-Speed Passing Maneuvers Observed on Rural Two-Lane, Two-Way Highway: Findings and Implications
• Design of Safe Urban Roadsides: An Empirical Analysis
• Desirable Length of Spiral Curves for Two-Lane Rural Roads
• Hierarchical Fuzzy Inference System to Evaluate Expert Opinions on Median Safety
• Operation and Safety of Right-Turn Lane Designs
• Radius Requirements for Trucks on Three-Dimensional Reverse Horizontal Curves with Intermediate Tangents
• Role and Application of Accident Modification Factors Within Highway Design Process
• Three-Dimensional Stop-Control Intersection Sight Distance: General Model
• Upstream Signalized Crossover Intersection: Optimization and Performance Issues