Evaluation of the Full Weekend Closure Strategy for Highway Reconstruction211 Projects: I-405 Tukwila to Factoria

摘要

In August 1997, the Washington State Department of Transportation (WSDOT) adopted211u001ea strategy of closing a single direction of freeway over an entire weekend for 211u001econstructing the overlay on a 5.5-mile (8.85-km) section of I-405. Work was 211u001eperformed over two weekends. Data were collected from field measurements, 211u001erecords, and surveys to assess construction quality, construction costs, and user 211u001eimpacts. Results were compared to historical data from WSDOT and from an NCHRP 211u001esynthesis study. Overlay surface smoothness, density, and gradation quality were 211u001egood, and no difference in consistency was found between night and day paving. 211u001ePublic response from motorists was decidedly positive, while business perceptions 211u001ewere mixed. Traffic simulations indicated that the total closure was preferable 211u001eto single lane closures over multiple nights. A decision checklist was developed 211u001efor use in making the closure strategy decision.