I'm new, freshman at LSU, C.E. major. That's basically the MINIMUM that they need to do. Widening I-10 from Port Allen to the 10/12 split is impossible b/c ROW acquisition would be ABSOLUTE AND COMPLETE HELL, besides a couple of bridges that might require complete rebuilding... one key to me is extending anything in WBR parish that might end at I-10 northwards to US 190 b/c that is a KEY alternate route that is often overlooked- the highway from I-49 in Opelousas is 4 lanes all the way into N.O. Plus I would appreciate a bridge in Plaquemine to connect both sides of the parish as is the case downriver in many places
The main issues I would see with widening I-10 within BR would be:
1) eliminating that choke point at the I-10/I-110 Split where the eastbound through lanes for I-10 get reduced to an auxilliary lane for the Washington St. exit;
2) renovating or replacing the bridges across University Lake at LSU;
3) resolving how to connect Perkins Road with the upgraded highway; and
4) configuring the one-way frontage roads between Acadian Thruway and the I-10/I-12 Split.
10/110/Washington St/Louise St interchanges.
Hardest part to reconstruct (for widening purposes). I would expect the South BR community, which got raped with the original I-10 construction, will now want to keep access to I-10 versus having to drive up to Gov't St. Maybe duel exits for access between Washington St. and I-10/110.
University Lake Bridge/Dalrymple Dr exit.
The worse about LSU traffic is trying to find your way to I-10 EB (I know firsthand from my 3 years living on/next to the LSU campus). The current interchange for Dalrymple Dr. is wedged inbetween University Lake, City Park, and a small subdivision south of I-10 (and west of Dalrymple) and allows for 3/4 complete movement (the missing contact in from Dalrymple to I-10 EB). That exit will stay and if properties have to bought for widening, maybe enough land can be aquired to add in another loop to I-10 EB.
The story I recall being floated was that this (partial) interchange would be removed. The sticking point here with widening is the comercial properties that have been constructed so close to I-10, especially now that area has become a destination for entertainment/shopping.
Acadian to the 10/12 Split.
Anthony mentioned the service roads. Other than for the intersection of Constitution Ave & College Dr. this will be a minimal issue. Maybe the state can throw in half a million to remove the Albertson grocery at SW corner of College & I-10 to allow the interchange to be reconfigured.