At an 'uncontrolled' intersection the rig entering a new road must yield.

Are these 2 roads, or two, like, driveways within a parking lot? Around here parking lots are not regulated, and police won't come to car accidents within them.

I found myself driving the other day in the driving part of a parking lot (I was heading to exit the lot) and realized another guy was racing me across the parking spots! He had to detour to avoid a shopping cart corral so I got there first without actually joining the race.