The roads from DU, past Westclock and through much of the resort (Floridian and then World Drive), is literally how many locals who live nearby travel south (and then elsewhere). As it sort of parallels 429, without as much traffic.
Using Floridian/World Drive for mundane tasks (like shopping trips) gets boring after a while. I will note there's a rather specific work case though! When I was a concierge I did often recommend the Wal-Mart in Hamlin to guests with cars, and that was the road it often took them down to get there.