Question: what is a 2 1 slope?
Answer: Answered July 2, 2019 · Author has 824 answers and 165.8K answer views. For every 2 feet you move horizontally, you move up or down 1 foot. As you drive down the interstate highway, 2:1 slopes always have guardrail along the edge of the pavement. You typically can view this slope from an on or off ramp.