Bridge Replacements – I-495 and Route 28 Interchange

Heavy/Civil Infrastructure, Bridges, Highways & Interchanges
Design-Build
Andover - Lawrence, MA
Massachusetts Bay Transportation Authority

This design build project consists of the I-495 and the Route 28 (Exit 41) Interchange in Andover, MA, including all ramps and sections of Route 28. The total length of the project is approximately 5.6K FT.

The goals are to rehabilitate the existing I-495 bridges over Route 28 and the MBTA Railroad as well as improve the safety of the existing ramp merge and diverge operations on I-495 NB between the Route 28 on-ramp and the Route 114 SB off-ramp. The six existing bridges will be reconstructed and widened to accommodate a future fourth lane in each direction. This project also includes, pavement rehabilitation, drainage improvements, guardrail and median barrier replacement, highway signage, and other incidental items.

By the Numbers

$8M
Design

add_road

$9.3M
Milling & Paving

$6.9M
Concrete Cast-in-Place & Rebar

water_drop

$4M
Drainage

$2.7M
Bridge Demolition

$2.8M
Shotcrete & Soil Nail

bolt

$3M
Highway Lighting & Electrical

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$98M
Project Value

Scope of Work
  • Replacement & widening of (six) 3-span bridges
  • Accelerated Bridge Construction (ABC), with Prefabricated Bridge Units (PBUs) and NEXT Beams
Unique Challenges
  • 50-month schedule
  • Staged bridge replacement
  • Multiple phase highway reconstruction, temporary alignments, and traffic shifts
  • MBTA coordination
  • Utility coordination (primarily with MBTA ROW)
The Bridge Replacements on I-495 and Route 28 Interchange project began in 2023 and is expected to be completed by 2027. The project is a bid build in Andover and Lawrence, Massachusetts for the Massachusetts Bay Transportation Authority (MBTA). The project includes replacement of the I-495 bridges over Route 28, and all ramps and sections of Route 28.
The Bridge Replacements on I-495 and Route 28 Interchange project began in 2023 and is expected to be completed by 2027. The project is a bid build in Andover and Lawrence, Massachusetts for the Massachusetts Bay Transportation Authority (MBTA). The project includes replacement of the I-495 bridges over Route 28, and all ramps and sections of Route 28.
The Bridge Replacements on I-495 and Route 28 Interchange project began in 2023 and is expected to be completed by 2027. The project is a bid build in Andover and Lawrence, Massachusetts for the Massachusetts Bay Transportation Authority (MBTA). The project includes replacement of the I-495 bridges over Route 28, and all ramps and sections of Route 28.

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