Route 37 Improvements

  • Route 37 Improvements - Cranston, Warwick
    Route 37 and I-295 Improvements - Cranston, Warwick
  • Route 37 Improvements - Cranston, Warwick
    Route 37 and I-295 Improvements - Cranston, Warwick
  • Route 37 Improvements - Cranston, Warwick
    Route 37 and I-295 - Cranston, Warwick
  • Route 37 Improvements - Cranston, Warwick
    Route 37 and I-295 - Cranston, Warwick

The Project

Improvements to Route 37 will be made in three separate projects that will rehabilitate or replace 27 bridges and make safety and congestion improvements in this critical east-west freeway in central Rhode Island, linking the cities of Cranston and Warwick, major retail, office and residential areas, Interstate highways and Rhode Island T.F. Green International Airport. With a daily traffic count of 42,000 vehicles, Route 37 is one of the state's busiest corridors.

Built in the 1960s, this freeway's bridges are now deteriorating under increasing vehicular volumes and freight demands. Almost half of the Route 37 bridges are classified as being in poor condition."

We are grateful for the efforts of the Rhode Island's Congressional delegation in securing a $20 million TIGER grant for Phase 1, and a $21 million BUILD grant for Phase 2, and a $25 Million RAISE grant for Phase 3 to make these improvements possible.

Phase 1 – Bridge Group 51A

The first contract involves preservation, major rehabilitation, and/or reconstruction of 15 bridge structures between U.S. Route 1 (Post Road) in Warwick and the Pontiac Avenue interchange in Cranston. Six of these bridges are structurally deficient. Four of them will be replaced and the other two will be rehabilitated.

Project also includes safety improvements at the Pontiac Avenue interchange from Route 37 West, widening the highway and ramps to eliminate chronic congestion and improve safety.

Phase 2 – Bridge Group 51B and the Cranston Canyon

The second contract will rebuild six bridges and build one new bridge along the Route 37 corridor west of Pontiac Avenue in Cranston. But it also will make a number of improvements to improve safety and reduce congestion at the interchange of Route 37 and I-295 and along I-295 itself in the section commonly known as "Cranston Canyon" because of the rocky walls along the highway. These include:

  • Creating a third lane at I-295 North with new pavement and minor widening, which will work as an auxiliary lane from Route 37 heading north
  • Extending this auxiliary lane northbound to the Route 6 interchange in Johnston
  • Shifting the ramp from Route 37 East to I-295 North from the high-speed lane to the right lane, improving safety and reducing conflicting movements
  • Repositioning the ramp from I-295 North to Route 37 West to eliminate a conflicting weave
  • Widening the ramp from Route 37 West to I-295 North to improve sight lines and reduce crashes

Phase 3 – Bridge Group 51C Route 37 Right Size

The third contract  will replace and rehabilitate 6 bridges carrying Route 37 over local roads, arterials, and rail lines, removing two obsolete bridges, as well as right-sizing the highway corridor to ensure it meets Rhode Island's transportation needs today, as Route 37 was overbuilt as part of a proposed highway expansion project that was never constructed. Additionally, a new at-grade interchange at Route 37 and U.S. Route 1 (Post Road) will eliminate the overbuilt loop ramps and restore wetlands in the area. Pedestrian crossings on U.S. Route 1 (Post Road) and Route 2 (New London Avenue) will be enhanced as well as coordinating traffic signals along both corridors.

Learn More

Project Schedule & Cost

Phase 1 – Warwick, Cranston
  • Location: Cranston/Warwick
  • Start Construction: 2020
  • Finish Construction: 2025
  • Total Projected Cost: $81.8 Million
  • Detours Needed: Yes
Phase 2 – Cranston
  • Location: Cranston
  • Start Phase Construction: 2022
  • Finish Phase Construction: 2026
  • Total Projected Cost: $85 Million
  • Detours Needed: Yes
Phase 3 – Cranston/Warwick
  • Location: Cranston/Warwick
  • Start Construction: 2025
  • Finish Construction: 2028
  • Total Projected Cost: $142.8 Million
  • Detours Needed: Yes

Additional Information & Graphics

Appendices D&E Test Pit and Soil Boring Logs
Appendix B Release Notification
Appendix C Phase I Environmental Site Assessment Report
Appendix F Laboratory Data Reports
Site Investigation Report 11-22-2022 Main Body
Phase 3 Project Summary Map
Phase 3 BG51C Public Notices - English
Phase 3 BG51C Public Notices - Spanish

DEM Environmental Report

As part of the above project, environmental investigation activities were performed along the shoulders and median of I-295 and on Cranston Street and the Washington Secondary Trail bike path to help guide soil management activities during construction and determine whether potentially hazardous materials are present in the areas where construction is being performed. Results of the environmental investigation have been compiled into a site investigation report that was submitted to RIDEM. A copy of the report is available for review below. For additional information regarding the environmental investigation or to make arrangement to review environmental records pertaining to this project, please contact Jeff Crawford at RIDEM at (401) 222-2797 x2777102

PROJECT UPDATES | NOVEMBER 13, 2026

Bridge Group 51B: I-295 area

Motorists should expect alternating one-way traffic for sidewalk improvements on Cranston Street, below Route 37, between Sherman Avenue and Overbrook Drive, Monday-Friday from 6 a.m. to 2 p.m.

Bridge Group 51C: I-295 to Pontiac Avenue and from Amtrak to Post Road

We are scheduled to place concrete for the new pier cap (a structure that sits at the top of a bridge pier) we are building at the New London Avenue Bridge. This will involve the closures of Route 2 (New London Avenue) South under Route 37, and the left lane on Route 2 North under Route 37, Tuesday night from midnight to 5 a.m. Please follow signed detour. We'll also have a right lane closure on Post Road South at Route 37 for utility relocation, Tuesday night from 6 p.m. to midnight, and Wednesday and Thursday nights from 10 p.m. to 6 a.m.

Click here for the latest lane closure information