I-18 is the proposed designation for a new terrain freeway running from New Orleans, Donaldsonville, Lafayette, Eunice, Kinder, the continuing west to the Texas border at the Sabine River to Jaspar Texas and ultimately to I-20 and I-45 in Dallas Texas. I-18 would start at I-310/LA 3127/Future I-49/U.S. 90 interchange. I-18 follows LA 3127 forming the southern segment of the Westbank Expressway Connector Toll-Road. LA 3127 was actually built in the 1970's with enough right-of-way for a future four-lane highway from I-310 to LA 70 in Donaldsonville. I-18 continues west to Lafayette forming a second Atchafalaya Basin freeway crossing, providing and alternative to the traffic congestion of I-10 in Baton Rouge. I-418 forms the northern segment of the Westbank Expressway Connector and I-318 would be the connector to the proposed South Baton Rouge Mississippi River Bridge near Gabriel. West of the new Atchafalya Basin Crossing Bridge, I-18 bypasses south and west of Lafayetter to form the proposed Lafayette Metropolitian Expressway, while I-218 forms the east and north segments of the extended Lafayette Metropolitan Expressway. An I-118 spur connector runs from I-18 south of Lafayette, bypassing east of Abbeville, crossing the Vermillion River with a high-level bridge between the Port of Vermillion and Intracoastal City, terminating at LA 82. The routing of I-18 becomes the alternate to I-10 for traffic to and from Houston to New Orleans. I-18 continues northwest to Eunice to run generally follow US 190 to Texas. I-18 then runs northwest to Dallas Texas forming a New Orleans to Dallas cross-link that avoids I-10 to Houston and I-45/I-20 to Dallas.
I-47 is the proposed designation for the LA 1 Expressway Toll-Road and the proposed Houma-Thibodaux LA 3127 to U.S. 90 Connector. LaDOTD has been building the LA 1 Expressway toll-road from Port Fourchon to US 90 west extension and now is planning to build the Houma/Thibodaux/LA 3127 Connector initially as a four-lane divided highway the eventually as a fully controlled access highway.
I-53 is the proposed designation for the proposed US 165 Freeway from Lake Charles to Monroe. South of Lake Charles, I-253 extends from I-53 to the Port of Lake Charles. I-53 could bypass Alexandria to the west, connecting the Alexandria International Airport, or it could be routed with I-49 through the city. I-53 continues to follow the US 165 freeway with new freeway bypasses around many of the towns as appropriate. I-53 then becomes the "I-69 Spur Extension" studied by LaDOTD and the Arkansas Highway Department in 2009 and is the conversion of the I-530 "I-69 Spur" that is part of the I-69 project in Arkansas. I-53 would connect to I-30 and I-40 in Little Rock Arkansas. Congress recently created the Future I-57 Interstate Corridor and plans to convert the existing US 67 freeway northeast of Little Rock to I-57, then complete the freeway to US 60 in Missouri. The existing US 60 four-lane highway will also be converted to I-57 eastward to connect to the existing I-57 in Sikeston Missouri. The combination of I-53 and I-57 forms a continuous trade corridor freeway from Chicago Illnois to Lake Charles. Altogether the I-18 system with I-53 links all the southern ports of Louisiana. The ports at Baton Rouge/Port Allen, the Port of South Louisiana along the Mississippi River, and the Port of New Orleans are all connected by the I-18/I-418 Westbank Expressway. Port Fourchon is connected by I-518. The ports south of New Orleans along the Mississippi are connected by completing the LA 23 four-lane to Venice. The other ports in southwest Louisiana could be linked through a secondary system of four-lane divided highways like LA 27 and LA 82 to Cameron, the Sabine Pass, Freshwater City, and the Port Vermillion/Intracoatal City via I-118 south from Lafayette.
I-14 was first proposed in the 2005 MAP-21 Act under the title "The 14th Amendment Highway" envisioned to extend from Augusta Georgia to Natchez Mississippi. A feasibility study was completed and came to the conclusion that projected traffic need was low for this particular route. Support in state transportation departments in Georgia and Alabama never really formulated. Mississippi and Louisiana were more receptive especially after Texas took the initiative to create the Central Texas Corridor.
A new bill (H.R. 6111) was introduced into the U.S. House of Representatives to extend the Future I-14 corridor created by Congress in 2015 FAST Act through Texas know as the Central Texas Corridor. If this bill is formally approved into law it will become the "I-14 Expansion and Improvement Act of 2018".
The proposed I-14 expansion begins from the Central Texas Corridor that generally follows U.S. 190 through Texas, adding the Central Louisiana Corridor that generally follows LA 28 through Louisiana, and the Central Mississippi Corridor that generally follows U.S. 84 through Mississippi. The Future I-14 could become part of the conceptual Acadian Xpressway Toll-Road System to complete the route through Louisiana sooner within the 2020-2040 time period sooner than the 2040-2050 time frame more likely if the traditional Federal and state budgeting process is followed, waiting for funding in competition with other national transportation projects, usually given a low priority because it is a future Interstate and not an existing Interstate.