New adaptive traffic signal timing technology is showing positive results by improving traffic flow within posted speed limits on stretches of Tennyson Road and Winton Avenue/D Street.

The smart tech—installed through a Transportation Fund for Clean Air grant from the Bay Area Quality Management District—dynamically adjusts traffic-signal patterns in real-time based on current traffic demands.

The technology was deployed to ease traffic congestion along Tennyson Road (Sleepy Hollow Avenue to Dixon Street) in May 2025 and Winton Avenue/D Street (Santa Clara Street to Atherton Street) in November 2025 along with related infrastructure updates.

On Tennyson Road, westbound traffic flow improved 43 percent in the morning (from 16 miles per hour to 22 mph) and 28 percent in the afternoon. Eastbound flow improved 20 percent in the morning and 21 percent in the afternoon.

On Winton Avenue/D Street, westbound traffic flow improved 49 percent (from 13 mph to 19 mph), with afternoon flow up 24 percent. Eastbound traffic saw up-ticks in performance of 23 percent in the morning and 24 percent in the afternoon.

The Bay Area Air Quality Management District (BAQMD) Transportation Fund for Clean Air TFCA grant funds that paid for the Hayward projects are distributed in Alameda County by the Alameda County Transportation Commission as program manager.