Q2 A traffic count was conducted on the northbound direction of a four-lane undivided multilane highway during the busiest hour of the day (refer to Table Q2). The highway accommodates commuter traffic between two major towns. It is located on rolling terrain, and has 3.3 m lanes and 1.2 m shoulders. The posted speed limit is 90 km/h. (a) Currently, the northbound direction has 12 access points per km. A service road is being constructed and will be completed this year. It will result in the elimination of 6 access points. Will this improve the level of service of the highway? (21 marks) (b) Traffic flow is expected to grow at a rate of 8% per year as a result of new commercial and residential developments in the surrounding area. How many years will it take for the level of service to reach an undesirable level of E? (4 marks) Table Q2: Traffic count during the busiest hour of the day on the northbound direction of a multilane highway Number of Vehicles Time Class 1 Class 2 Class 3 Class 4 5:15 - 5:30 PM 34 275 31 25 5:30 - 5:45 PM 18 349 18 32 5:45 - 6:00 PM 29 440 27 34 6:00 - 6:15 PM 42 487 13 46 Class 1: Motorcycles Class 3: Vans and medium lorries Class 2: Passenger cars Class 4: Heavy trucks and buses Q2 A traffic count was conducted on the northbound direction of a four-lane undivided multilane highway during the busiest hour of the day (refer to Table Q2). The highway accommodates commuter traffic between two major towns. It is located on rolling terrain, and has 3.3 m lanes and 1.2 m shoulders. The posted speed limit is 90 km/h. (a) Currently, the northbound direction has 12 access points per km. A service road is being constructed and will be completed this year. It will result in the elimination of 6 access points. Will this improve the level of service of the highway? (21 marks) (b) Traffic flow is expected to grow at a rate of 8% per year as a result of new commercial and residential developments in the surrounding area. How many years will it take for the level of service to reach an undesirable level of E? (4 marks) Table Q2: Traffic count during the busiest hour of the day on the northbound direction of a multilane highway Number of Vehicles Time Class 1 Class 2 Class 3 Class 4 5:15 - 5:30 PM 34 275 31 25 5:30 - 5:45 PM 18 349 18 32 5:45 - 6:00 PM 29 440 27 34 6:00 - 6:15 PM 42 487 13 46 Class 1: Motorcycles Class 3: Vans and medium lorries Class 2: Passenger cars Class 4: Heavy trucks and buses