SAN ANTONIO -

Major roadwork began downtown Monday as part of the Market Street Realignment project.

The city closed the Interstate 37 South entrance ramp on Market Street.

All traffic is being diverted south to Tower of the Americas Way, and drivers can get on I-37 south using the entrance ramp just past Cesar Chavez Boulevard.

Additionally, the Interstate 37 North entrance ramp at Market Street will close beginning Tuesday, July 23. This closure will last for two weeks to allow construction crews to work on utilities in the entrance ramp area.

All traffic leaving the downtown area by entering I-37 North will continue on Market Street to the I-37 North access road, which will lead to the entrance ramp at Commerce Street. No exit ramps will be affected.

The Market Street Realignment Project will redesign Market Street to run parallel with Commerce Street.

The work will create a pedestrian walkway on Commerce Street under I-37 with access to the Alamodome and surrounding restaurants and hotels.

The city also plans to install new sidewalks, bike lanes, traffic signals and a storm drain system.

The cost of the project is estimated at approximately $37 million and is scheduled to be completed in November 2014.

The project is one of the first steps in the $325 million dollar expansion of the Henry B. Gonzales Convention Center.

To see a map of the scheduled road closures visit http://www.sanantonio.gov/CIMS.

Reporter Cory Smith contributed to this story.