crosstraffic

Crosstraffic, commonly written as cross traffic, refers to vehicles moving perpendicular to the main traffic flow, typically at intersections where a cross street, driveway, or access road meets a larger road. Crosstraffic creates conflicts when vehicles from the intersecting route enter the path of through or turning traffic on the main road.

In road design and traffic management, crosstraffic is a key consideration for safety and efficiency. Engineers analyze cross-traffic volumes, speed, and sight distance to determine appropriate control measures. Common solutions include traffic signals with protected and permissive phases, stop or yield signs, dedicated left-turn or right-turn lanes, and lane channelization. Roundabouts and other redesigns can reduce cross-traffic conflicts by consolidating turning movements and lowering speeds.

Right-of-way rules at intersections vary by jurisdiction but generally aim to minimize conflicts with crosstraffic. In unsignalized intersections, through traffic on the main road often has priority, while cross traffic yields or stops. At signalized intersections, appropriate phases protect opposing through and cross-traffic, and left-turn phases may be protected to reduce crossing conflicts.

Contextual uses of the term include driving in parking lots and commercial developments, where vehicles frequently cross aisles and pedestrian paths. Here, crosstraffic is managed through speed limits, clear sight lines, wayfinding signage, and carefully designed curb lines and markings.

Safety implications are central to crosstraffic planning. Crashes involving cross traffic account for a portion of urban intersection incidents, prompting strategies such as improved visibility, signal timing optimization, and, in some cases, geometric changes to reduce conflict points.