SKAB3842 Traffic Engineering Question Assignment 1 20202021-2 PDF

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ASSIGNMENT 1 : SKAB3842 – TRAFFIC ENGINEERINGSubmission date: 25 April 2021 Submission through blackboard The following data shows the counted flow on a roadway for 7 days. What is the average and maximum daily flow? Day Number of Vehicles Monday 8500 Tuesday 8600 Wednesday 8100 Thursday 8750 Friday...

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ASSIGNMENT 1 : SKAB3842 – TRAFFIC ENGINEERING Submission date: 25 April 2021 Submission through blackboard

1.

The following data shows the counted flow on a roadway for 7 days. What is the average and maximum daily flow? Day Number of Vehicles Monday 8500 Tuesday 8600 Wednesday 8100 Thursday 8750 Friday 8800 Saturday 6700 Sunday 5550

2.

The following table contains two sets of one-week traffic counts data obtained on a stretch of rural road. a) Compute the ADT for both datasets. b) Estimate the AADT for the road section. Day March 2009 (veh/day) October 2009 (veh/day) Monday 12500 10300 Tuesday 10500 12000 Wednesday 15200 13000 Thursday 13400 14500 Friday 16000 15200 Saturday 10500 8500 Sunday 8000 10200

3.

The following counts were observed on a rural highway. Compute a) the average hourly volume; b) the peak volume for a 1-hour period. Time Traffic Volume 7:00 – 8:00 500 8:00 – 9:00 900 9:00 – 10:00 760 10:00 – 11:00 700 11:00 – 12:00 400 12:00 – 13:00 850 13:00 – 14:00 500 14:00 – 15:00 660 15:00 – 16:00 725 16:00 – 17:00 700 17:00 – 18:00 1100 18:00 – 19:00 750

4.

The average traffic flow on a length of highway is 47230 veh/day, which 83% is cars, 2% buses, 5% medium lorries, 7% large trucks and the remaining is taxi. Convert the hourly flow to passenger car unit.

5.

The traffic flow along the roadway in city is 600 veh/hr. It composed of 150 motorcycles, 50 large buses, 40 medium lorries, 60 small vans and the remaining vehicles is cars and taxis. Convert the flow in veh/hr to pcu/hr.

6.

The following table shows the information on journey time and delay along a 6 km main roadway. Estimate the journey and running speed along this roadway. Journey time (min) 5.0 5.5 6.0 6.5 7.0 7.5 Delay (min) 0.5 0.8 1.5 2.5 3.1 3.7 Number of vehicles 6 9 17 22 11 4

7.

The speeds of five vehicles were measured at the midpoint of a 0.8 km section of a roadway. The speeds for vehicles 1, 2, 3, 4 and 5 were 71, 68, 82, 79 and 74 km/hr. Assuming all vehicles were travelling at constant speed over this roadway section, calculate the time-mean-speed and space-mean-speed.

8.

What is the time-mean-speed and space-mean-speed for four vehicles which travel 2 km at speeds 40, 50, 60 and 80 km/hr?

9.

A section of highway is known to have a free-flow speed of 88.5 km/hr and a capacity of 3300 veh/hr. In a given hour, 2100 vehicles were counted at a specified point along this highway section. If the linear speed-density relationship applies, what would you estimate the speed of these 2100 vehicles to be?

10.

A section of highway has the following flow-density relationship: q = 80 k – 0.4 k2 What is the capacity of the highway section, the speed at capacity, and the density when the highway is at one-quarter of its capacity?

11.

While taking measurement by moving-observer method, a test vehicle covered a 1 km section in 1.5 minutes going against traffic and 2.5 minutes going with traffic. Given the traffic flow was 800 vph and that test vehicle passed 10 more vehicles than passed it when going with traffic, find: a) The number of vehicle encountered by the test vehicle while moving against traffic b) The speed of the traffic being measured

12.

At one road section, 35% of vehicles travelling at 60 km/h, 35% of vehicles travelling at 80 km/h, and the rest travelling at 100 km/h. The observer was travelling with the traffic at 70 km/h at 7 km road section. The test vehicle was overtaken by 20 more vehicles than he can overtake. When the test vehicle moved against the traffic, he encountered 292 vehicles in the opposite direction. Determine: a) the traffic flow b) the average journey speed c) type of speed for the above technique d) the number of vehicles travelling at 100 km/h

13.

Task: a) Find 1 question with solution related to moving observer method b) Find 1 question with solution related to chapter 1...