A horizontal curve is being designed through mountainous terrain for a four-lane road with lanes 10 ft. wide. The central angle is known to be 40 degrees, the tangent distance is 520 ft., and the stationing of the tangent intersection (PI) is 2600+00. Under specified conditions and vehicle speed, the roadway surface is determined to have a coefficient of side friction of 0.08, and the curve's super-elevation is 0.09 ft/ft. What is the stationing of the PC and PT and what is the safe vehicle speed?