LIRR Third Track Expansion

LIRR Third Track Expansion

Long Island, New York
United States

As part of a multidisciplinary team, TYLin provided engineering design services for the Long Island Railroad (LIRR) Third Track Expansion Project In New York.

The LIRR Third Track Expansion Project was a key initiative to transform and expand vital regional transportation infrastructure to strengthen Long Island’s economy, grow business opportunities, and create jobs.

The project constructed a third LIRR line to ease a 9.8-mile bottleneck between Hicksville and the Queens borough of New York City. Involving capital expansion and state-of-good-repair work, the project added the third track, renovated stations, installed new signal equipment and switches, upgraded seven bridges, and eliminated seven street-level grade crossings to LIRR’s busiest corridor.  

TYLin’s scope of work included design services for right-of-way (ROW) retaining walls for the full project corridor in both directions, grade crossing eliminations, bridge widenings for Nassau Boulevard and Glen Cove Road, and temporary support of excavation along the full project corridor.

The new third track reduces congestion and enables true bi-directional service during peak hours, improving reliability for more than 100,000 daily commuters and enhancing quality of life for communities along the Main Line.

Project Highlights:

  • TYLin assembled a highly qualified design team to prepare and submit designs to meet the project’s accelerated schedule. 
  • The project was delivered on time and under budget. 
  • Two railroad bridges were replaced over a single weekend, eliminating weekday downtime.