One method traffic planners use to calculate recommended curve speeds for trucks is with the formula

where S is the recommended curve speed in mph, R is the radius of the curve (in feet), V is the average truck speed on the straight approaching the curve (in mph), and B is the banking of the curve (as a percent). Find the recommended curve speed if the radius is 195 feet, the average approach speed is 60 mph, and the curve banking is 10%.

Transcribed Image Text:

15R(112 0.66 V + 0.091 V2 + 10B) S = 1000 + 1.36R