Determine the practical stopping distance (m) for a road with speed limit of 50kph and grade of 4.9%.
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Determine the practical stopping distance (m) for a road with speed limit of 50kph and grade of 4.9%.
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- If 420’ are available as Sight distance on an urban highway having a 2.5% grade. Assuming all the parameters according to ASHTO, find maximum speed which can be posted on the highway for safe travelling.A four-lane undivided highway (two lanes in each direction) has (3.4m) lanes, with (1.2 m) shoulders on the right side. There are 4.5 access points per km, and the posted speed limit is 80 km/h. What is the estimated free-flow speed?Determine the superelevation of a road section on an urban area with a design speed of 110kph, and Rmin=630m. What can you say about the computed value of e?
- An existing six-lane divided multilane highway with a field-measure free-flow speed of 45mph serves a peak-hour volume of 4,000 vehicles per hour, with 10% trucks (50% SUT, 50% TT). The PHF is 0.88. The highway has generally rolling terrain. What is the likely level of service for this segment? Good weather, no incidents, no work zones, and regular drivers may be assumed.A four-lane urban freeway segment has a peak demand volume of 3,500 vehicles per hour for the two eastbound lanes. The PHF is 0.95 and there are no trucks, buses or RVs because the freeway is classified as a parkway and such vehicles are prohibited. The segment has 12 ft lanes, no lateral obstructions, 3 ramps within the influence area, and meanders through some beautiful rolling terrain. Assuming the road will be used by commuters and those familiar with the road, what is the flow rate (pcphpl)? Provide your answer to the nearest integer.when desiging an auxiliary lane, the deceleration length need to be determined. Briefly explain what is the deceleration length and how to determine it
- Draw a space – time diagram for traffic within a tunnel. Assuming there exist a 2-lane before the tunnel but the tunnel itself is 1-lane and after the tunnel the road returns to being a 2-lane.A 960 m segment of 5.2 km four-lane undivided multilane highway in a suburban area is at a 1.5% grade. The highway is in level terrain and lane widths are 3.35 m. The measured free flow speed is 73 km/hr. The peak hour volume is 1900 veh/hr, PHF is 0.9 and there are 13% truck and 2% RVs. Determine the LOS, speed, and density for upgrade and downgrade.A section in SCTEX has a flow density relationship of q = 75k - 2.7k² where q is the flow and k is the density. what is the space mean speed if the density of the expressway is 15 veh/km