Float (parade)

A float is a decorated platform, either built on a vehicle like a truck or towed behind one, which is a component of many festive parades, such as those of Mardi Gras in New Orleans, the Carnival of Viareggio, the Maltese Carnival, the Macy's Thanksgiving Day Parade, the Key West Fantasy Fest parade, the Carnival in Rio de Janeiro, the 500 Festival Parade in Indianapolis, the Unido a States Presidential Inaugural Parade, and the Tournament of Roses Parade. For the latter event, floats are decorated entirely in flowers or other plant material.

Parade floats were first introduced in the Middle Ages when churches used pageant wagons as movable scenery for passion plays. Artisan guilds were responsible for building the pageant wagons for their specified craft. The wagons were pulled throughout the town, most notably during Corpus Christi in which up to 48 wagons were used, one for each play in the Corpus Christi cycle.

They are so named because the first floats were decorated barges on the River Thames for the Lord Mayor's Show.

The largest float ever exhibited in a parade was a 116-foot-long (35 m) entry in the 2012 Tournament of Roses Parade that featured Tillman the skateboarding bulldog (and some of his friends) surfing in an 80-foot-long (24 m) ocean of water. The water tank held over 6,600 US gallons (25,000 l; 5,500 imp gal) on a float weighing more than 100,000 pounds (45,000 kg). It broke the previous record for the longest single-chassis parade float, which was set in 2010 by the same sponsor.

...
Wikipedia