Amazon.com: Health O Meter 2600KL Digital Wheelchair Ramp Scale with Folding Ramp, Capacity 1000 lbs, Resolution 0.2 lb, 32-1/4" x 36" Platform, 32¼" Width x 9 7/8" Depth Ramp : Health & Household
Ramp Metering: A Proven, Cost-Effective Operational Strategy - A Primer: 1. Overview of Ramp Metering