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(Supported by NJDOT Standards and Guidance Documents)

Roadway Design Tool

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


Safe Speed for Horizontal Curve (mph)

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  Last Updated:  June 19, 2015