Department of Transportation

Safe Speed For Horizontal Curves When V is less than or equal to 50 mph

U.S. Customary English Units

This program calculates Safe Speed for horizontal curves when V is less than or equal to 50 mph. Source Reference

V = 0.5 ( -.015R+( (.015R)2 + 4R((15E/100) + 2.85 )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 11:37 AM