Question: Refer to the right illustration (Fig. 1), one 2-lane conventional highway goes through the points of A, B, C, D, E, F. PI1 and

Refer to the right illustration (Fig. 1), one 2-lane conventional highway goes

Refer to the right illustration (Fig. 1), one 2-lane conventional highway goes through the points of A, B, C, D, E, F. PI1 and P12 are points of intersection. The center angles of the two arcs are 90. If the design speed is 30 mph and radius of each curve is 300 ft, estimate the minimum distance between PI1-P12 using Caltrans standard. (Hints: 1. Segment CD must be able to accommodate the superelevation transition based on 1/3-2/3 rule. You need to refer to Caltrans HDM $202.2, Tables 202.2A through 202.2E and Figure 202.5A.) (2 pts) Figure 1 B O D P12 PI1 E F

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