Safety Performance of Part-Time Shoulder Use on Freeways, Volume 1: Informational Guide and Safety Evaluation Guidelines
Left or right shoulders can be strategically opened as travel lanes, and "part-time shoulder use"
is defined as using a shoulder "some, but not all, hours of the day.”
The TRB National Cooperative Highway Research Program's
NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 1:
Informational Guide and Safety Evaluation Guidelines
provides an overview of part-time shoulder use, presents the results of past
operational studies, and presents the results of safety research conducted through NCHRP's
Safety Performance of Part-time Shoulder Use on Freeways project.
Supplemental to the document is a Freeway Analysis Tool, which includes
BOS Data,
S D PTSU Data, and a
Prediction Tool, as well as
NCHRP Web-Only Document 309: Safety Performance of Part-Time Shoulder Use on Freeways, Volume 2: Conduct of Research Report.
This Summary Last Modified On: 11/8/2021