Frontage / Service Road
LOC-FSR-04 Recommended Local
Frontage / Service Road
A Local street running alongside a higher-speed Arterial or Freeway, giving property access and slower-mode movement a lane physically separated from the through traffic next to it.
Typical at: Rural Suburban Compact Urban
Undeveloped and Core are edge cases.
Speed and modal hierarchy
Design speed & speed limit
[SPEED LIMIT 20]
Follows the Local default: 20 mph hard maximum, no exceptions, even where this road runs alongside a higher-speed Arterial or Freeway.
Modal hierarchy
Pedestrian> Bicycle> Transit> Vehicle> Freight
Design notes
The safety rationale is separation, not speed: keeping people walking and biking off a roadway designed for faster through traffic.1 This is the Local-scale companion to the Arterial safety rule that access needs are served by a separate road rather than mixed into through lanes.
Related patterns
Default (No Parking, No Direct Property Access) (ART-DEF-01) (the Arterial-scale rule this pattern serves as the Local-scale companion to), Stroad (Commercial Arterial) (ART-STD-05) (the Avoid pattern that results when this separation isn't provided)
References
- Legal / regulatory AASHTO, A Policy on Geometric Design of Highways and Streets.