The biggest infrastructure project in the history of Arroyo Grande will officially start next week, shuttering one of the main routes into the Village until late this year.

According to a news release from the city, the Traffic Way Bridge Replacement Project will close the bridge connecting Station Way and West Branch Street starting Monday with construction projected to wrap up in November.

A detour will be in place for the duration of the project, and all businesses and driveways along Traffic Way will remain open during construction, according to the release.

Several temporary traffic control measures have already been implemented, including a traffic circle at the Arroyo Grande High School entrance to allow legal left turns from the school parking lot, reducing the bridge’s overall volume of traffic, according to the release.

A pair of temporary traffic signals will be installed at the Fair Oaks Avenue freeway exit and at the intersection of Bridge Street and West Branch Street to improve traffic flow, according to the release.

The 91-year-old bridge has been inspected by engineers multiple times since 2018, which detected deck cracking, failed expansion joints, concrete spalling, abrasion and erosion within the creek channel, lowering its bearing capacity and requiring a full replacement.

Most of the replacement project’s $11 million price tag will be covered by the Federal Highway Bridge Program, according to the release.

Additional project updates, detour maps and details can be found at www.arroyogrande.org/TWB.