GATE 2023 Transportation Engineering Evaluation Quiz 11

Consider the following data:

Design speed = 90 kmph

Reaction time of driver = 2 second

Coefficient of friction between tyre and road surface = 0.45 . Then the minimum non-passing sight distance provided for a vehicle coming down a 7% gradient will be ______ m.

A two-phase signalized intersection is designed with a cycle time of 120 s. The amber and red times for each phase are 4 s and 50 s, respectively. If the total lost time per phase due to start-up and clearance is 2 s, the effective green time of each phase is ______s. (in integer)

A traffic stream on a particular highway is moving with speed of 62 kmph. The time interval between consecutive vehicles is _____ sec, if distance between consecutive vehicles 88 m

The Radius of entry in rotary is 30 m. The minimum possible exit radius of rotary is__m

The maximum superelevation to be provided on a road curve is 1 in 15.  If the rate of change of super elevation is specified as 1 in 135 and the road width is 10m, then the minimum length of the transition curve on either end will be ______m. Considering rotation about inner edges.

The design traffic for the design of flexible pavement in rural areas as per revised IRC procedure for the following data is __________ msa.

Annual average daily commercial vehicle at last count (July 2019) = 150

Rate of traffic growth = 6%

Design life = 10 years

Vehicle damage factor = 1.5

The road will be complete in July 2022 and assume a lane distribution factor of 1.

A Marshall specimen is prepared for bituminous concrete with a bitumen content of 5% by weight of total maximum. The theoretic and the measured unit weight of the mix are 2 .442 gm/cm³ and 2 .345 gm/cm³ respectively. The bitumen has a specific gravity of 1.The percentage voids in mineral aggregate filled with bitumen (VFB) is ____% (Round off your answer in nearest integer)

A vehicle travelling at the design speed of 90 kmph on a descending gradient of 2.5% meets an ascending gradient of 2.5%. Calculate the minimum length of vertical curve required (in m) to facilitate smooth movement of vehicle considering headlight sight distance of 100 m and assume that passenger is comfortable in all conditions (Round of to 2 decimal places).