Originally Posted by marlinspike

Unless otherwise posted,
55 on highways (think of this meaning 55 on any type of road not listed below, a highway isn't what most people think it is)
35 on rural rustic roads
25 in business and residential districts
35 on highways in cities or towns

I am presuming a regular passenger car. (see Va Code 46.2-870 to 878, 46.2-1300)