Jim Williams
Author
Publisher
Colorado Department of Transportation, Applied Research and Innovation Branch
Pub. Date
2020.
Language
English
Description
Deployment of 2+1 Road with Barrier in Colorado certainly has potential to improve safety where it replaces conventional 2-lane highways, primarily by preventing head on and sideswipe crashes. The Swedish design is most widely implemented and has a record of success, so Colorado drivers expect the "slow" lane to be the ending lane, and somewhat gentler tapers than Sweden employs.
Author
Publisher
Colorado Department of Transportation, Applied Research and Innovation Branch
Pub. Date
2020.
Language
English
Description
Since 2000 CDOT has made effective use of Safety Performance Functions (SPF), Level of Service of Safety (LOSS) concept and diagnostic norms to prioritize, plan and scope safety improvements on all projects. A recent trend in road safety research, however, is to develop SPFs for each crash type. This approach is significantly more costly and labor intensive than the one used by CDOT, the benefits of this approach, however, were not well understood....