Originally Posted by rickst29

When you park a TM along the highway (and open it, for some reason) the entry door is along the curb. So that's 'curb side' The 'Street Side' is the side which is closer to traffic, and the center line of the road.

Or, here's another way to explain: 'street side' = Port side (for land-lubbers ); 'curb side' is Starboard side.