The I-4 corridor, an east to west road with more independent voters along its expanses than anywhere else in the key battleground state of Florida, has been called the 'highway to heaven' for US politicians.

Passing through cities like Orlando, trailer parks and farmland, the highway stretches across an incredibly diverse population, dividing the mainly Republican north from the predominantly Democratic south.

With 29 electoral votes at play, wooing Florida, and the voters along the I-4, has become particularly important for politicians as they spend millions of dollars reaching out to the area's residents.

Andy Gallacher reports from Florida.