Construction of the Pontchartrain Expressway began in the 1950s. It would later be incorporated into Interstate 10. I-10 enters Orleans Parish after crossing the 17th Street Canal; this is where the expressway designation begins. At the vicinity of West End Boulevard/Florida Avenue exit, the expressway turns to the southeast along the right-of-way for the former New Basin Canal which had been filled in between 1937 and 1947. The expressway continues along this right-of-way as I-10 until a stack interchange with U.S. 90 (Claiborne Avenue) in the CBD.
At this interchange, I-10 breaks off to the northeast and Business U.S. 90 begins. The expressway continues southeast along the upriver side of the CBD as an elevated highway that leads to the Crescent City Connection. This section was completed by 1958 opening of the Crescent City Connection.
The Business U.S. 90 portion of the expressway was expanded in the mid 1980s to accommodate the second span of the Crescent City Connection which opened in 1988. This stretch of the expressway and the stack interchange of I-10 and U.S. 90 received further reconstruction in the early 1990s, including two reversible HOV lanes that stretch from the intersection of Earhart Boulevard and Magnolia Street (underneath the Pontchartrain Expressway) across the Crescent City Connection to the Westbank Expressway. Reconstruction of the northern end of the expressway in the I-610 Split vicinity was undertaken in the late 1990s. Also in the late 1990s, further work was done on the expressway as three ramps were constructed, one connecting East Business U.S. 90 to East I-10 and the others connecting West I-10 to West Business U.S. 90 and westbound Claiborne Avenue (West US 90).
The Norfolk Southern Railway has an overpass crossing near the Metairie Cemetery between the City Park Avenue and West End Boulevard/Florida Avenue exits. The expressway dips down to 12 feet (3.7 m) below sea level to allow for the rail line to pass overhead. This area once experienced flooding on a regular basis in heavy thunderstorms and tropical systems. The problem was so common, a depth meter was painted on the overpass support columns to warn drivers of the water's depth. A new pumping station was completed adjacent to the expressway in 2004 to keep this area dry and allow the interstate to remain open in the event of an evacuation.
Read more about this topic: Pontchartrain Expressway
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