Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Steep edge and smooth edge between asphalt road points and road marking points: (a) Steep edge; (b) Smooth edge. The black points are low intensity points, the green points are high intensity points and the red points are transition points between high intensity points and low intensity points.
