U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
| REPORT |
| This report is an archived publication and may contain dated technical, contact, and link information |
 |
| Publication Number: FHWA-HRT-21-005 Date: June 2021 |
Publication Number: FHWA-HRT-21-005 Date: June 2021 |
PDF Version (7.83 MB)
Technical Report Documentation Page
| 1. Report No.
FHWA-HRT-21-005 |
2. Government Accession No. | 3 Recipient's Catalog No. | ||
| 4. Title and Subtitle
Narrowing Freeway Lanes and Shoulders to Create Additional Travel Lanes |
5. Report Date
June 2021 |
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| 6. Performing Organization Code HRDO-20 |
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| 7. Author(s)
David Hale (ORCID: 0000-0001-5486-9367), Alexandra Kondyli (ORCID: 0000-0002-3462-0000), Juan Argote (ORCID: 0000-0003-0294-9247), Xiaoxiao Zhang (ORCID: 0000-0003-1545-8041), Bastian Schroeder (ORCID: 0000-0001-8916-421X), Levi Button (ORCID: 0000-0002-9697-1543), Jennifer Atkinson (ORCID: 0000-0002-5523-4205), Daniel Stock (ORCID: 0000-0002-6597-950X), Adil Cheema (ORCID: 0000-0003-3103-7757), Soheil Sajjadi (ORCID: 0000-0001-7635-4399), Murat Aycin (ORCID: 0000-0002-5798-3381), Mark Brackstone (ORCID: 0000-0003-2087-9385), Geline Canayon (ORCID: 0000-0001-7742-9399), Jordi Casas (ORCID: 0000-0002-7110-8751), Annique Lenorzer (ORCID: 0000-0003-3313-8623), Anxi Jia (ORCID: 0000-0001-5086-9693), Chetan Joshi (ORCID: 0000-0002-6242-5181), and Rachel James (ORCID: 0000-0001-9138-510X) |
8. Performing Organization Report No. |
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| 9. Performing Organization Name and Address
Leidos, Inc.
University of Kansas
Aimsun Inc.
University of Virginia
Kittelson & Associates, Inc.
PTV Group |
10. Work Unit No. (TRAIS) | |||
| 11. Contract or Grant No.
DTFH61-16-D-00030 |
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| 12. Sponsoring Agency Name and Address
U.S. Department of Transportation |
13. Type of Report and Period Covered
Final Report; September 2017–September 2019 |
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| 14. Sponsoring Agency Code
HRDO-20 |
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| 15. Supplementary Notes
The Government Task Manager was Joe Bared (HRDO-20). |
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| 16. Abstract
The Federal Highway Administration is investigating narrowing freeway lanes and shoulders as a cost-effective mobility strategy. The objectives of this project were to develop improved macroscopic analysis tools, calibrate car-following models that capture narrowed lane driving behavior, conduct real-world case studies, develop narrowed lanes deployment recommendations, and investigate dynamic lane-narrowing technologies. The case studies showed that the lane-narrowing treatment improves mobility significantly without compromising safety. |
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| 17. Key Words
Lane narrowing, microscopic model calibration, dynamic narrow lane technologies, lane-narrowing treatments, lane design, high-occupancy vehicle lane |
18. Distribution Statement
No restrictions. This document is available to the public through the National Technical Information Service, Springfield, VA 22161. |
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| 19. Security Classification (of this report) Unclassified |
20. Security Classification (of this page) Unclassified |
21. No. of Pages
150 |
22. Price
N/A |
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| Form DOT F 1700.7 (8-72) | Reproduction of completed page authorized |
