Work to upgrade Paris Road (Louisiana 47) to Interstate 510 commenced in 1985. The 2.7-mile project cost $82-million project and was constructed in several phases. The northbound lanes of the freeway were completed in October 1992. A ribbon cutting ceremony took place ahead of the southbound lane opening on November 13, 1992.2
Planning for Interstate 510 began in 1970 as a replacement for the congested two-lane Paris Road. AASHTO approved the future Interstate on July 6, 1977. Environmentalist protests however delayed work, with the environmental impact statement (EIS) not completed until 1981. The first aspect of work focused on widening of the northern approach of the Paris Road bridge. Next a four-lane surface road between the bridge and I-10 was built so that crews could dismantle existing Paris Road and commence construction on the new freeway. Work also focused on building of a four lane frontage road and new roadway linking I-510 with Almonaster Road.3
Extensions of Dwyer Road and Lake Forest Boulevard coincided with construction of the freeway mainline as the second to last phase of road work. This led to completion of Interstate 510 between Dwyer and Almonaster Roads and the construction of the U.S. 90 (Chef Menteur Highway) interchange. It was hoped that I-510 would spur work on the Florida Avenue freeway project to better join St. Bernard Parish with New Orleans.3
Cancelled Interstate 410
Interstate 510 and 310 in St. Charles Parish were previously incorporated into the proposed greater Interstate 410 outer belt for the New Orleans metropolitan area. This alignment appeared on official Louisiana state maps in the mid-1960s. The Interstate 410 plan was deferred and eventually reemerged as a megaproject included in the Louisiana Statewide Transportation Plan Update under the same project that would expand the Chalmette Bridge (LSTP-029).1
The outer belt connection was envisioned along with proposed freeways along Florida Avenue northeast of Downtown New Orleans and the Louisiana 3139 / Earhart Expressway Extension west to the New Orleans International Airport (MSY). The Florida Avenue freeway would have connected to I-10 and I-610 near their eastern meeting and continue east to Interstate 510. The extension of Interstate 510 would resurrect the old I-410 proposal and provide a third freeway connection to the west. Despite the inclusion in the Statewide Transportation Plan Update,1 plans for this freeway did not advance.