A two-way street is a street that allows vehicles to travel in both directions. On most two-way streets, especially main streets, a line is painted down the middle of the road to remind drivers to stay on their side of the road. Sometimes one portion of a street is two-way, the other portion one-way. If there is no line, a car must stay on the appropriate side and watch for cars coming in the opposite direction and prepare to pull over to let them pass.
A two-way street can also be used as an idiomatic metaphor to indicate that something goes both ways. For example, in this sentence: "Communication within the supervisor-employee relationship must be a two-way street that is heavily traveled in both directions."
- McConnell, Charles R. (2002). The Effective Health Care Supervisor, p. 138.