# Question: a horizontal curve on a twolane highway 12 ft lanes...

###### Question details

A horizontal curve on a two-lane highway (12- ft lanes) has PC at station 123 + 80 and PT at station 129 + 60. The central angle is 35 degrees, the superelevation is 0.08, and 20.6 ft is cleared (for sight distance) from the inside edge of the innermost lane. Determine a maximum safe speed (assuming current design standards) to the nearest 5 mi/h.