01049652

Component

https://doi.org/10.3141/2027-04

http://scholar.google.com...lock&publication_year=2007

The "Highway Capacity Manual" provides two methods, based on delay and space, for the assessment of pedestrian level of service (LOS) at signalized intersections. Current procedures for evaluating pedestrian LOS are examined, and results indicate that these procedures do not adequately reflect the negative impact of turning vehicles. Pedestrian LOS measures are proposed to reflect not only pedestrian delay and space but also traffic interruptions, freedom of movement, and comfort. These measures are consistent with LOS measures currently used for freeway segments and ramp merge areas. The percentage of compromised pedestrian crossings is proposed as a means to quantify the negative impact of turning vehicles on pedestrian service and as a LOS measure at signalized intersections. A pedestrian crossing is designated as compromised if a pedestrian is delayed or is forced to change travel path or speed in response to a turning vehicle. The percentage of compromised pedestrian crossings was assessed for 13 crosswalks. Results of the assessments illustrate that as right-turn volumes increase, the percentage of compromised pedestrian crossings increases. The proposed method provides an objective engineering tool for measuring the impact of turning vehicles on pedestrian service. It may be appropriate to use this measure to quantify the need for pedestrian improvements (e.g., if the percentage compromised exceeds 15%, then it may be appropriate to implement a leading pedestrian interval or other enhancement).

01089135

English

pp 27-36

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104548

Print

Figures (4) ; Photos (7) ; References (9) ; Tables (4)

Crosswalks; Highway capacity; Level of service; Pedestrian movement; Right turns; Signalized intersections; Turning traffic

Highway Capacity Manual

Leading pedestrian intervals

Highways; Operations and Traffic Management; I71: Traffic Theory; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2007 5:03PM

• Arrival-Based Uniform Delay Model for Exclusive Protected-Permitted Left-Turn Lane at Signalized Intersections
• Driver Behavior Model of Saturation Flow
• Effect of Site and Population Characteristics on Freeway Bottleneck Capacity
• Errors in Analyses for Capacity and Timing Design of Signalized Intersections in Absence of Steady Queue Discharge Rates
• Estimating Truck Equivalencies for Freeway Sections
• Field Measurement of Approach Delay at Signalized Intersections Using Point Data
• Headway Acceptance Characteristics of U-Turning Vehicles at Unsignalized Intersections
• Implementing the Concept of Reliability for Highway Capacity Analysis
• Incorporation of Transportation User Perception into Evaluation of Service Quality of Signalized Intersections
• Probabilistic Analysis of "Highway Capacity Manual" Models: Case Study of a Signalized Intersection
• Relationship of Lane Width to Saturation Flow Rate on Urban and Suburban Signalized Intersection Approaches
• Total Approach Capacity at Signalized Intersections with Shared and Short Lanes: Generalized Model Based on a Simulation Study
• Travel Time Measurement Using Toll Infrastructure