What is the calculated stopping sight distance (ft) for a -3% grade when the design speed is 55 mph, assuming the AASHTO recommended deceleration rate and perception-reaction time. Response Feedback: S = √²/[30(a/32.2+G)] +1.47Vtr
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- Ninth Lecture Civil Dept. Example 15.8 Location of Object Near a Horizontal Curve A horizontal curve with a radius of 240 m connects the tangents of a two-lane highway that has a posted speed limit of 56 kmph. If the highway curve is not super- elevated, e = board can be placed from the centerline of the inside lane of the curve, without reducing the required SSD. Perception-reaction time is 2.5 s, and f 0.35. 0, determine the horizontal sightline offset (HS0) that a large bill-What is the intersection sight distance (m) needed at a stop controlled intersection for a passenger car to turn left onto a 2-way, 2-lane road with a design speed of 90 km/h? [round to the nearest meter] Response Feedback: ISD=0.278V t major gWhat is the intersection sight distance (ft) needed at a yield controlled intersection for a passenger car to turn right onto a 2-way, 2-lane road with a design speed of 50 mph? [round to the nearest foot] Response Feedback: ISD=1.47V major g
- What is the intersection sight distance (ft) needed at a yield controlled intersection for a passenger car to turn left onto a 2-way, 2-lane road with a design speed of 50 mph? [round to the nearest foot] Response Feedback: ISD=1.47V major gWhat is the brake reaction distance (ft) when the design speed is 55 mph, assuming the AASHTO recommended deceleration rate and perception-reaction time. Response Feedback: brake reaction distance = 1.47VtrQUESTION 1 What deceleration rate (ft/s²) does AASHTO recommend for calculating stopping sight distance?
- 2. Figure shows the captured aerial photography showing the locations and speeds of 4 vehicles travelling between section x & y. An observer located at X observes the four(4) vehicles passing pt X during a period of 15 sec. Calculate the following: a) Space Mean Speed b) Time Mean Speed c) Average Spacing d) Headway 60 kph 40 kph 45 kph 55 kph Direction D B A of flow 300mGiven the following adjusted technical description, solve the AREA using Double Parallel Distance DPD Method. Course Adj Lat Adj Dep DPD 2A AB -68.99 67.12plz, solve this problem, it is not graded question. Transportation Engineering-1 During a 70 sec period, a detector is occupied by vehicles for the following times: 0.31, 0.39, 0.41, 0.35, and 0.53 sec. Estimate the values of flow (q), density (k) and speed (v). Assume that the loop detector is 10 ft and that that the average length of the vehicle is 20 ft.
- A driver traveling at 70 mph sees a hazard at a certain distance ahead. The driver theapplies the brakes immediately time is 4 seconds and begins slowing the vehicle at 15the distance from the stopping point to avoid hitting the boulder is 12. 30 meters. Calculatethe distance from the boulder upon perception. ID NUMBER 143-) C Problem 1.3. Calculate the minimum non-passing sight distance on a highway at a descending gradient of 6%. Given tile following data : (i) Design speed = 80 kmph (ii) Reaction time of driver = 2.5 seconds. (iii) Coefficient of friction between tyre and road surface = 0.4 pogging sightQ- What will be the maximum velocity (In KMPH and upto two decimal) that can be permitted on 13 cm super elevation of 600 m radius circular BG track..................