The Ontario Ministry of Transportation is completely closing Highway 401 tonight, Saturday, June 17 and early tomorrow, Sunday, June 18, as contractors demolish and remove the overpass carrying Henry Street Whitby across the highway.

The Ministry is closing the entire highway between Brock Street Whitby and Lakeridge Road from midnight until 8 a.m., but it’s closing some parts of the highway earlier.

It closes one lane in each direction starting at 8 p.m. It closes the remaining two lanes in each direction at midnight.

It closes the ramp onto the westbound 401 from west- and eastbound Consumers Drive from 10 p.m. tonight until 8 a.m. tomorrow. It closes the ramp onto the westbound 401 from southbound Brock Street South from 8 p.m. tonight until 10 a.m. tomorrow. And, it closes the ramp onto the eastbound 401 from southbound Highway 412 from 10 p.m. tonight until 8 a.m. tomorrow.

Passengers riding GO Transit buses operating along this route can expect delays and detours from 8 p.m. until 10 a.m.:

• 96 Oshawa / Finch express.

The Ministry is directing westbound traffic to detour:

southward along Brock South;
westward along Victoria Street West; and then
northward along Lakeridge Road South to the 401.

It’s directing eastbound traffic to reverse the westbound detour routing.

Traffic diverting off Highway 401 may also delay other transit services on parallel routes, including:

• GO Transit — 92 Oshawa / Yorkdale.
• Durham Region Transit — 302 Baldwin / Brock, 308 Whitby Shores, 385 Whitby late-night shuttle and 900 PULSE.

Thanks to TorontoRoadClosures.com for pointing out this information and generally keeping us up-to-date on road closures!