SAN ANTONIO -

Construction is set to begin Tuesday at Fredericksburg Road and Medical Drive.

"Fredericksburg Road is going to stay right at the same level it’s at; where you see it today,” said Josh Donat, with TxDOT.  “What we're going to do is move Medical Drive underneath."

The project that will require digging. The first step in the process, however, is the development of on and off ramps on TxDOT purchased land. The actual underpass construction and a two week closure of Fredericksburg Road is still likely a year away.

"Thursday night, you're going to see your first lane closures; they're going to be overnight,” said Donat.

Almost all of the construction will take place overnight. While wait times for drivers should eventually be reduced, that is not the end goal, according to TxDOT. The main purpose is get emergency traffic in and out of the medical center faster.

"When people are in an ambulance or trying to get to the hospital, you know, every second is critical and every second is precious,” said Donat. During construction, medical traffic will have to be accounted for.

"Throughout the duration of this project, emergency vehicles will be given top priority,” said Donat.

TxDOT estimated the cost of the project at $14.6 million, paid for mostly by fuel taxes and city contributions. Construction is scheduled to be completed by mid-2015.

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