Commuters who use either the Disraeli Bridge or Osborne Bridge on a regular basis noticed some big changes Monday. The Osborne Bridge has begun re-routing all southbound traffic to the west side of the bridge.

Previously drivers were using the east side of the bridge.The west sidewalk will remain closed to pedestrians, though. People on foot will have to continue to use the east sidewalk.

The city said the major overhaul of the bridge is on-time and on-budget and expected to be completed by late October.

City officials estimate the construction will extend the bridge’s lifespan by nearly 75 years.

And in Point Douglas, the Disraeli overpass opened all of its southbound lanes at 6 a.m. Monday.

Northbound lanes of the new overpass opened in June.

As for the Disraeli Bridge, southbound lanes opened last month and northbound lanes are expected to open later this fall.

Construction will continue on the overpass through the early fall, with all lanes of both the overpass and the bridge set to open in October.