Austin reports active mobility work on William Cannon, I-35 near Riverside

Austin Transportation and Public Works reported that multiple mobility projects were underway along William Cannon Drive and that traffic had shifted on the southbound I-35 frontage road near Riverside Drive in a July 20 update.

The notice, published in the city’s Austin Mobility News series, provides a status snapshot for people traveling through two major Austin corridors. It identifies active work and a traffic change, but the city’s indexed summary does not specify individual William Cannon project costs, contractors or completion dates.

What the city reported

The July 20 update said multiple projects were underway along William Cannon Drive. The city did not characterize the projects in the available summary as completed work, and it did not provide a single shared construction schedule or funding breakdown for them.

Near Riverside Drive, the update reported a southbound I-35 frontage-road traffic shift. Drivers using the frontage road near that area should expect the roadway configuration to differ from prior travel patterns while the reported shift is in place.

Austin Transportation and Public Works issued the mobility update. The City of Austin identifies the information as part of Austin Mobility News, its transportation-project update series.

Transit detours remain listed

Capital Metropolitan Transportation Authority separately lists a Riverside and IH-35 bridge-construction detour running from Feb. 24 through Aug. 30, 2026. CapMetro’s service-alert page also lists active construction-related detours on Austin roads including William Cannon and Bluff Springs.

The transit alerts are important for riders whose trips use the Riverside/IH-35 area or affected William Cannon-area service. The available materials do not establish that the city’s reported I-35 frontage-road shift and CapMetro’s Riverside/IH-35 detour are the same work zone. They may overlap geographically, but the notices should not be treated as confirmation of a single project or traffic-control plan.

What remains unclear

Neither available source supplies a total cost, funding sources, procurement information, contractor names or a completion date for the William Cannon work described in the July 20 city summary. The materials also do not provide a detailed list of the individual projects underway along that corridor.

For now, the confirmed timetable in the available notices is CapMetro’s Riverside/IH-35 bridge-construction detour, listed through Aug. 30. Residents, drivers and transit riders traveling through the affected corridors can use the city’s mobility updates and CapMetro’s active alerts to check for current conditions and service changes.