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Reconstruction is complete at Oak Street & Idylwood Road bridges

Idylwood Road bridge now open!

The Oak Street and Idylwood Road bridges over I-495, the Capital Beltway, are reopened!

The HOT Lanes project cut the ribbon on the Idylwood Road bridge on March 18, 2011. Watch videos from the event below.

Closing the Oak Street and Idylwood Road bridges was necessary to safely demolish the existing bridges and rebuild new, longer bridges to accommodate a wider Beltway. The bridges are located between the I-66 and Route 7 interchanges.

The Capital Beltway HOT (High Occupancy Toll) Lanes will bring the most significant improvements to the Beltway since its opening in 1964. Construction of 12 new overpasses and interchanges at the Capital Beltway, including those at Oak Street and Idylwood Road, are necessary to accommodate the four new Beltway lanes. The Oak Street and Idylwood Road bridges will include bike and pedestrian paths.

Videos of the ribbon cutting

Idylwood Road bridge Reconstruction Overview

On Aug. 16, 2010, the Idylwood Road Bridge over the Capital Beltway closed. It reopened on March 18, 2011.

The new two-lane bridge includes pedestrian- and bicycle-friendly sidewalks and new curb and gutter to better manage storm water runoff. It is one of the first improvements to be delivered under the $1.5 billion, 14-mile project. About 58 Beltway bridges and overpasses are being reconstructed for the HOT Lanes which are scheduled to open in late 2012.

Original construction plans for the Idylwood Road Bridge called for closing one of its two lanes for approximately two years and installing temporary traffic signals to alternate one-way traffic across the bridge. However, Transurban-Fluor, the Capital Beltway HOT Lanes partners and Fluor-Lane, the project’s design-builder, proposed and won local community support for an alternate construction plan that eliminated the one-way traffic plan and shortened the construction period by 17 months. The fast-track construction required the complete closure of Idylwood Road Bridge, allowing construction crews round-the-clock access to the bridge. The entire bridge was rebuilt simultaneously, rather than in phases, and was completed in about six months.

The Idylwood Road bridge carries about 15,000 vehicles per day.