Abstract
The design of a freeway speed-change lane (SCL) depends mainly on the manner of deceleration, initial speed, and the speed to be approached at the SCL. The design SCL length should provide drivers with sufficient distance to diverge at a reasonable speed and to decelerate comfortably. In the design guides, recommended SCL lengths are based on a deterministic approach in which a single value is assumed for each design parameter. An alternative approach is presented: a probabilistic methodology is used to analyze SCL length. This reliability-based analysis allows for the calculation of the probability of noncompliance for any specific SCL length, which corresponds to the percentage of drivers who may not be able to decelerate comfortably. Models are developed with different analysis methodologies and are applied to estimate the probability of noncompliance at seven SCL sites on the basis of speed and deceleration field data collected at these sites.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Transportation Research Record: Journal of the Transportation Research Board
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.