A 400-series arch roof streetcar designed by Perley A. Thomas is in the middle of a Carnival parade, 1938.
St. Charles was operating in belt service at that point in time (St. Charles outbound, Tulane inbound). One thing making me scratch my head is that the parade is going in both directions on St. Charles. On the contemporary parade route, Rex goes down the lake side of St. Charles, between Louisiana and Jackson, so they can toast at the Story home. The trucks that follow come down the river side for those blocks. Still, both sides go in the same direction. This looks like the float in the foreground is going uptown, will turn around somewhere, and then head back downtown.
Oh yeah, just a side note--the seats those 400-series streetcars have on them all had two holes on top with brass fittings. That's where the Jim Crow signs went. As more white people got on the streetcar, they'd put the sign on a seat further to the back, to keep the black folks back there. NOPSI, the the company that operated the transit system in New Orleans in the 1950s and 1960s was way ahead of other cities in the south in stopping the back-of-the-bus practice, much to the chagrin of "States Rights" segregationists. In 1980, many of those former segregationists and their allies switched from Democratic to Republican party affiliation, because Ronald Reagan's "mandate" made it safe for them to leave the Democratic party in Louisiana."
But those are minor details in the Grand Scheme of Things. After all, parades are only a couple of weeks away!