One-way traffic (or uni-directional traffic) is traffic that moves in a single direction. A one-way street is a street either facilitating only one-way traffic, or designed to direct vehicles to move in one direction. One way streets typically result in higher traffic flow as drivers don't have to deal with on-coming traffic nor turns through on-coming traffic. Residents may dislike one-way streets due to the circuitous route required to get to a specific destination and the higher speeds impacting pedestrian safety. Some studies even challenge the original motivation for one-way streets in that the circuitous routes negate the higher speeds.