Before you enter the park look on the ground, you will notice that it's red. Walt's friends and workers strongly advised not to do this though because the carpet would get extremely dirty in short amounts of time. So Walt decided to paint the ground red instead. Also Walt wanted people to feel like they were entering a new world after passing through the tunnels, so at first he was going to put huge curtains in front of the entrance to main street. His coworkers disagreed with him saying that people would run into on another while trying to go through the curtain so he made it a tunnel instead.
Black pavement gets hot, which keeps people on the move.
The pavement changes to calmer, cooler colours in the other lands. The idea behind this, I've been told by Disney Tour Guides, is to get people into the park, rather than bottlenecking the main entrance corridor. The gas lamps on Main Street are 150 years old, purchased as scrap from the city of Baltimore, Maryland. There is a whole crew just to dust the window sills on Main Street. The massage parlor in Disneyland is located above the restrooms near the restaurant on Main Street.