A four-lane divided multilane highway (two lanes in each direction) in rolling terrain has the following additional characteristics: • BFFS of 60 mi/h (100 km/h) • No access points • 12-ft lanes (3.6m) • 8-ft (2.4m) shoulder on the right side and 6-ft (1.8m) shoulder on the left • The peak-hour factor is 0.84 • The traffic stream consists of 6% trucks, 4% buses and 3% recreational vehicles. • The driver population adjustment factor is estimated at 0.90. • Analysis flow rate is 1250 pc/h/ln. i) A new urban development will be built in the proximity of this highway section. This development will require the addition of 20 access points per mile (12 access points per km) but all other conditions (geometry and traffic) will stay the same. What is the differential (change) in the average speed (S) before and after the urban development?
A four-lane divided multilane highway (two lanes in each direction)
in rolling terrain has the following additional characteristics:
• BFFS of 60 mi/h (100 km/h)
• No access points
• 12-ft lanes (3.6m)
• 8-ft (2.4m) shoulder on the right side and 6-ft (1.8m) shoulder on the left
• The peak-hour factor is 0.84
• The traffic stream consists of 6% trucks, 4% buses and 3% recreational vehicles.
• The driver population adjustment factor is estimated at 0.90.
• Analysis flow rate is 1250 pc/h/ln.
i) A new urban development will be built in the proximity of this highway section. This development will require the addition of 20 access points per mile (12 access points per km) but all other conditions (geometry and traffic) will stay the same. What is the differential (change) in the average speed (S) before and after the urban development?
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