a) The 'e' value of a crest curve is found to be greater than the eye height of the driver above the road surface. Determine the minimum length of the curve, if a hazard is assumed to be at the level of the carriageway and the driver has an average eye height from the road surface. (CR,10) b) The figures below present two scenarios of an intersection layout with vehicle 'A' on the minor road and vehicle 'B' on the major road with a building (shaded) at one corner of the intersection. Vehicle 'A' in its quest to cross the intersection must look for an appropriate gap based on the intersection sight distance to be able to cross safely without colliding with vehicle 'B'. i. Compare the intersection sight distance provision of the two scenarios AN(3) What accounted for the results in (i) above? i. ii. AN(5) How would you improve the intersection sight distance irrespective of the scenario? AN(2) Line of sight Scenario 1 Scenario 2 Note: The drawings are of the same scale c) A consultant was tasked to undertake the design of the Atta Mills road which is a collector road connecting Old Barrier along the Accra-Winneba 3 road to Aplaku. A design speed of 65km/h was used for the geometric design of the road. However, after the construction of the road, the Department of Urban Roads (DUR) posted a speed limit of 50km/h. Comparing the two speed values, do you think DUR did the right thing and why? (CR,5)