The second design that was analyzed consists of 4 non-ADA and 2 ADA parking spaces in one row, all of which are oriented 90-degrees from the curb. The COF “Parking, Loading, Access & Private Street Requirements” refer to the ADA regulations through the “Building and Safety Division” for the ADA parking spaces. This code manual was used to determine the number of spaces and the corresponding sizes of each standard and ADA stall. This design consists of a fully enclosed lot design with a 24-foot aisle of clearance and a single driveway accommodating for both entry and exit. This design allows users to enter and exit the trailhead from the same entrance. Because of this, users with large cars may not be able to easily enter and leave the site. The pavement specifications followed are in accordance with Detail Numbers 10-09-010 and 13-10-009.
Design Alternative 1 & Final Design
The first design consists of 5 non-ADA and 2 ADA parking spaces in one row, all of which are oriented 90-degrees from the curb. This design consists of a circle drive design with an 18-foot aisle of clearance and a single direction of flow for traffic entering and exiting the lot seen in Appendix D. This design has one entrance and one exit at opposing sides of the trailhead to allow cars to pass through the trailhead without having to turn around. Pavement specifications followed are in accordance with Detail Numbers 10-09-010 and 13-10-009. Although it is more expensive to construct, pavement was chosen over gravel for the benefits of easier snow removal in the winter months, preventing additional soil from entering the culvert, and easier application and maintenance of ADA parking compliance. This implementation includes the use of a motor vehicle deterrence system at the entrance of the trail to prevent motor vehicles from harming the trail and pedestrians as well as concrete wheel stops at the front of each parking space to prevent vehicle users from veering off of the path.
