Figure illustrates two consecutive ramps on an older freeway. It may be assumed that there...

Figure illustrates two consecutive ramps on an older freeway. It may be assumed that there is a ramp- to-ramp flow of 150 veh/h.

Figure: Segment for Problem

(a) What is the expected LOS for the conditions shown?

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(b) Several improvement plans are under consideration:

i. Connect the two ramps with a continuous auxiliary lane.

ii. Add a third Jane to the freeway and extend the length of acceleration and deceleration lanes to 300 feet.

iii. Provide a lane addition at the on-ramp that continues past the off-ramp on the downstream freeway section. The off-ramp deceleration lane remains 200 feet long.

Which of these three improvements would you recommend? Why? Justify your answer.

FFS = 60 mi/h; ID = 2 int/mi