Roadway Standards Section 330 - Commercial, Industrial And Multifamily Driveways

1. All driveways shall meet ADA accessibility requirements if the driveway intersects with a planned or existing sidewalk or other pedestrian facility.
2. Driveways should be designed with a minimum 28-foot wide approach except where the Comprehensive Plan requires narrower driveways.
3. If the design vehicle for the site requires it per Section 250.1.3 or if traffic operations necessitate additional travel lanes, driveways wider than 28 feet may be required to reduce the pedestrian crossing length or implement additional measures to reduce conflicts with pedestrians.
4. Driveways on streets with curb tight sidewalk should be constructed per Standard Drawing D600. 
5. Driveways on streets with curb and sidewalk with a landscape strip should be constructed per Standard Drawing D650. 
6. In rare cases where a development's trip generation is such that higher speed egress maneuvers from the adjacent roadway are desired or is used for a large number of truck deliveries, the County may allow or require driveways to be constructed per Standard Drawing D675.
7. Driveways constructed without curbs should be constructed per Standard Drawing D500.
8. Driveway throats (measured from the back of the public sidewalk in the UGB and from the edge of pavement outside the UGB to the nearest perpendicular drive aisle) shall have a minimum length of 20 feet but should be designed to accommodate the 95th percentile queue.  Driveway throat depths may be required to be based upon a traffic study per Section 295.
9. Driveways accessed by trucks with trailers, should require a minimum throat length of 50 feet.
10. Parking, intersecting drive aisles and designated pedestrian crossings are prohibited within the minimum throat depth.
11. If a gate is proposed on a driveway serving the public, the gate shall be placed a minimum of 20 feet from back of sidewalk or edge of pavement, whichever is greater.  If queues are likely to extend into the travel lane of the nearest roadway, then a queuing analysis shall be provided per Section 295.  Gates may require the approval of the fire district. 
12. Gates are required to have a minimum of a 20' wide unobstructed opening.  The opening width will be required to increase when the length of the anticipated vehicle increases unless the gate is set back far enough for the vehicle to be perpendicular to the gate.