Nightly SR-84 Closures Begin in Sunol

Caltrans began overnight full closures on State Route 84 in Sunol on May 18 as crews started work on the Arroyo de la Laguna Bridge replacement, the agency said. The closures affect Niles Canyon Road between Main Street and Bond Street from 8 p.m. to 5 a.m., Monday through Friday nights, for about four weeks. The work is part of a larger bridge project in unincorporated Sunol that Caltrans said will continue with daytime construction through October. The agency said drivers should expect detours around the work zone and allow extra travel time. ### Which stretch of SR-84 is closing each night? State Route 84 is closing between Main Street and Bond Street in Sunol during the overnight work window, according to a Caltrans notice published May 18. The agency said the full closures run from 8 p.m. to 5 a.m. on weeknights and are scheduled to last for approximately four weeks. (dot.ca.gov) Sunol is the focus of this phase of work because crews are starting construction on the Arroyo de la Laguna Bridge project there. Caltrans said full closures are needed for the safety of workers and motorists while the replacement work is underway. ### What exactly is Caltrans replacing in Sunol? Caltrans said it is replacing the Arroyo de la Laguna Bridge, a structure built in 1939, as part of its work along the SR-84 corridor. (dot.ca.gov) The agency said the project is intended to provide a wider roadway, ADA-compliant sidewalks and what it described as a safer and more dependable connection along SR-84. The Niles Canyon Safety Improvements project page shows the Arroyo de la Laguna Bridge effort has been in planning for years. Caltrans said environmental work on the bridge project was programmed earlier, and the agency listed a public scoping meeting in August 2018 as part of the project history. ### How are drivers being routed around the closure? (dot.ca.gov) Caltrans said motorists will be detoured around the work zone using local roads and Interstate 680 connections, with routes varying by direction of travel. Drivers heading toward Main Street in Sunol are being directed by way of Main Street, Kilkare Road, Foothill Road, Castlewood Drive and Pleasanton-Sunol Road to reach I-680. (dot.ca.gov) Drivers coming from Bond Street toward SR-84 are being sent along Main Street, Kilkare Road, Foothill Road, Castlewood Drive and Pleasanton-Sunol Road before entering I-680, Caltrans said. The agency also laid out separate detours for motorists traveling from Livermore, from Pleasanton-Sunol Road and toward Fremont, and said changeable message signs would guide traffic. (dot.ca.gov) ### How long will the disruption last? Caltrans said the overnight full closures are expected to continue for about four weeks from the May 18 start date. The agency also said daytime construction will follow and continue through October, with additional traffic advisories to be issued as the project moves ahead. Patch, citing Caltrans, reported this week that Niles Canyon Road would close nightly for the next few weeks as crews began replacing the 1939 structure. (dot.ca.gov) That local report matched the agency's project timeline and closure notice. ### Where can commuters check for updates before driving? Caltrans said all work is weather dependent and advised motorists to use alternative routes when possible. (dot.ca.gov) The agency's District 4 bridge-closure notice said additional traffic advisories would be sent as the project progresses. The District 4 Niles Canyon project page lists the Arroyo de la Laguna Bridge Project among the corridor improvements and provides contact information for people who want updates by email. (patch.com) Caltrans said daytime construction will continue through October, making those agency notices the next checkpoint for commuters using SR-84 through Sunol. (dot.ca.gov) (dot.ca.gov)