Change of Grade on Roadways Calculator – What is Rate of change?

Grade is a basic element of vertical alignment and more effective for trucks than cars and includes speed differentials between vehicle types calculate change of grade using this free calculator.

Grade on Roadways

To calculate Change of Grade on Roadways:

  • Length of Curve (L)

  • Initial Roadway Grade (g1)


  • Final Roadway Grade (g2)




  • Rate of change of grade (r)

  • Rate of change of grade (r)