| Title | FHWA Research and Technology Evaluation: Innovative Intersection Design |
|---|---|
| Record ID | 81711 |
| Personal Name Creator |
Badgley, Jonathan; Fowler, Joshua; Mahavier, Kendall; Peirce, Sean |
| Personal Name Contributor |
Moulden, John V. |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Corporate Contributor |
United States. Federal Highway Administration. Office of Corporate Research, Technology, and Innovation Management |
| Publisher | United States. Federal Highway Administration. Office of Corporate Research, Technology, and Innovation Management |
| Publication Date | 20210800 |
| Language | English |
| Abstract | This report assesses the effects of the Federal Highway Administration's (FHWA's) investment in the Innovative Intersection Design research program and related activities on the availability and quality of such research; awareness and adoption of innovative intersection designs in the United States; and impact of deployed innovative intersection designs on road-user safety, traffic mobility, and construction costs of the U.S. transportation system. The particular intersection and interchange designs researched by FHWA and included in this evaluation are diverging diamond interchanges, restricted-crossing U-turns, displaced left turns, median U-turns, and mini-roundabouts. Although it is difficult measure the effects of specific FHWA activities, the evaluation found strong evidence of FHWA's influence on the acceptance, consideration, and adoption of innovative intersection designs. The findings suggest awareness, adoption, and deployment are higher than they would have been without FHWA research and activities. FHWA laid the foundation for national adoption and deployment of innovative intersection designs by providing empirical evidence of the potential improvements to safety, mobility, and construction costs; increasing stakeholders' awareness of and confidence in them; and contributing to the development of design standards. FHWA's impact is conservatively estimated to have provided road-user safety, traffic mobility, and construction-cost benefits totaling more than $200 million (undiscounted) over the last decade. |
| Rosap ID | dot:56950 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/56950 |
| TRT Terms | Interchanges and intersections; Roundabouts; U turns; Diamond interchanges; Left turns |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1779776 |
| Contract Number | HW9AA300 |
| Report Number | FHWA-HRT-21-024 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/81000/81700/81711/FHWA-HRT-21-024.pdf |
| Format | |
| Database | NTL Digital Repository |