The state is launching two surveys as part of a feasibility study on possible improvements between the Interstate 10 bridge and the I-10/12 split, officials said Wednesday.

Sherri LeBas, secretary for the state Department of Transportation, said the reviews should be finished by the spring of 2016.

One of the surveys will be online.

The other will include questions via cell phones and landlines and will be done by LSU.

“It is to get feedback from the community and the traveling public that uses the corridor to help us,” LeBas said.

The study, including the surveys, will cost between $1.5 million and $2 million.

LeBas first mentioned the plans in August amid complaints about regular backups on the bridge and the lack of any immediate solutions.

Average daily traffic on the structure totaled 102,350 vehicles in 2013, a rise of 16 percent since 2010 and up 33 percent since 1998, according to DOTD figures.

The state faces a $12 billion backlog of road and bridge projects.

Several bills have been filed in the Legislature to tackle the backlog, including one that would raise $7 billion over 10 years by increasing the state sales tax by 1 cent, from 4 percent to 5 percent.

Residents in East Baton Rouge Parish would pay 10 percent in state and local sales taxes if that plan won approval.

However, the proposal requires the approval of two-thirds of the House and Senate, and Gov. Bobby Jindal opposes any tax hikes unless there are corresponding cuts elsewhere.

The online survey will be available at through the end of May.

It is open to the public.

Hard copies of the survey will be available at a variety of locations, including public libraries in East Baton Rouge, West Baton Rouge, Ascension and Livingston parishes.

They can be mailed to the project team.

“We want feedback,” LeBas said. “We are using the feedback as we develop steps.”

LeBas said environmental studies will be required after the feasibility study is done.

Follow Will Sentell on Twitter @WillSentell. For more coverage of Louisiana government and politics, follow our Politics blog at