| Title | Evaluation of Lane Reduction "Road Diet" Measures and their Effects on Crashes and Injuries |
|---|---|
| Record ID | 25193 |
| Corporate Creator | United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center |
| Corporate Contributor |
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology |
| Publisher | Turner-Fairbank Highway Research Center; United States. Federal Highway Administration |
| Publication Date | 20041201 |
| Language | English |
| Abstract | Road diets are often conversions of four-lane undivided roads into three lanes (two through lanes and a center turn lane). The fourth lane may be converted to bicycle lanes, sidewalks, and/or on-street parking. In other words, existing space is reallocated; the overall area remains the same. This study evaluated road diets at several locations in California and Washington. Key findings of this study are: 1) Crash frequencies at road diets in the after period were approximately 6% lower than at the corresponding comparison sites; 2) Crash rates did not change significantly from the before period to the after period; 3) Road diet conversions did not affect crash severity; and 4) Road diet conversions did not result in a significant change in crash types. |
| Rosap ID | dot:35853 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/35853 |
| TRT Terms | Before and after studies; Crash rates; Crash severity; Crash types; Four lane highways; Highway design; Three lane highways |
| General Subjects | Design; Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure; Accident frequencies; Road diets |
| Geographical Coverage |
United States; Washington; California |
| TRIS Online Accession No |
00974914 |
| Report Number | FHWA-HRT-04-082 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/25000/25100/25193/04082.pdf |
| Format | |
| Database | NTL Digital Repository |