Department of Transportation

Safe Speed For Horizontal Curves When V is greater than 50 mph
Based on "A Policy on Geometric Design of Highways and Streets", 2001

U.S. Customary English Units

This program calculates Safe Speed for horizontal curves when V is greater than 50 mph. Source Reference

V = 0.5 ( -.03R + ( (.03R)2+ 4R((15E/100) + 3.6 )1/2)

Enter R and E
R = Radius of Horizontal Curve (ft.)
E = Superelevation (percent)
Safe Speed for Horizontal Curve (mph)

Last updated date: October 9, 2020 11:36 AM