In 1964, the Theodore Roosevelt Bridge opened to carry Interstate 66 (I-66) between Washington, D.C., and Rosslyn. Soon afterwards, a development boom in the 1960s began to revitalize Rosslyn with the construction of a large number of high-rise office buildings and hotels in its center and a smaller number of residential buildings on its outskirts. Arlington County widened Rosslyn's major streets to accommodate the increased motor vehicle traffic that this new development would bring. A skywalk system carried pedestrian traffic over these widened streets. While planners expected retail establishments to develop along the skywalks, few such establishments actually opened. As a result, the skywalk system attracted few pedestrians. The Arlington County government has since announced plans to dismantle some or all of the bridges that carry the skywalks over Rosslyn's broad streets.