Transportation System Plan 2018-2038

Table H-2 Functional Classification Evaluation Factors Classification Functions Forecast Year Average Daily Traffic (ADT) Desired Spacing (miles) Land Access Function Minimum Intersection Spacing Speed Limit (mph) On-Street Parking Major Arterial Primary : regional and sub- regional traffic movement Secondary : land access 15,000 or more 1-2 miles Limited to major generators ½ mile 35-45 Prohibited Minor Arterial Primary : sub-regional traffic movement Secondary : land access 10,000 to 15,000 ½ to 1 mile Some movements restricted; drivew ay spacing controlled ¼ mile 30-40 Prohibited Major Collector Primary : traffic collection/distribution between local and arterial streets Secondary : land access 5,000 to 10,000 ½ mile Limited regulation; subject to safety controls 300 feet 25-35 Limited Minor Collector Primary : Inter- neighborhood traffic and direct land access 2,500 to 5,000 ¼ mile Subject to safety controls only 300 feet 25-30 Allow ed Sources: Transportation and Land Development, Institute of T ransportation Engineers; T he Traffic Institute, Northw estern University ; Parametrix . H-4