Transportation Engineering Questions and Answers Part-28

1. Which of the following travel time and delay studies doesn’t require a test vehicle?
a) Floating car technique
b) Average speed technique
c) Moving vehicle technique
d) License plate observations

Answer: d
Explanation: License plate observations is the travel time and delay study that doesn’t require a test vehicle. It is one of the most common method for calculating travel time and delay.

2.How is average delay time calculated in License plate method?
a) Average delay time = (Sum of all delay time) / (Number of matched license plates)
b) Average delay time = (Sum of all delay time) x (Number of matched license plates)
c) Average delay time = (Sum of all delay time) + (Number of matched license plates)
d) Average delay time = (Sum of all delay time) – (Number of matched license plates)

Answer: a
Explanation: Average delay time is calculated in License plate method by the relation given below, Average delay time = (Sum of all delay time) / (Number of matched license plates). While the delay time is calculated by, Delay time = Observed travel time – Free flow travel time.

3. Which of the following is not an application of travel time and delay study?
a) Collection of rating data
b) Problem location identification
c) Economic analysis
d) Determining relation between mean speed and flow

Answer: d
Explanation: Determining relation between mean speed and flow is not an application of travel time and delay study. Collection of rating data, problem location identification, economic analysis an model calibration are some of the applications of travel time and delay study.

4. The driver has to drive the test car above the average speed of the traffic in an average-speed technique.
a) True
b) False

Answer: b
Explanation: The statement, “The driver has to drive the test car above the average speed of the traffic in an average-speed technique” is an incorrect statement. The correct statement is, “The driver has to drive the test car at the average speed of the traffic in an average-speed technique.”

5. In which test vehicle technique the test vehicle has to make a round trip on a test section?
a) Floating-car technique
b) Average-speed technique
c) Moving-vehicle technique
d) License plate technique

Answer: c
Explanation: In Moving-vehicle technique the test vehicle has to make a round trip on a test section from east to west direction. In Floating-car technique the test car attempts to pass as many vehicles as those that pass the test vehicle.

6.The selection of test to be a test-vehicle based or not depends upon which of the following criteria?
a) Available personnel and equipment
b) Driver’s choice
c) Type of road
d) Location of test

Answer: a
Explanation: The selection of test to be a test-vehicle based or not depends upon the availability of personnel and equipment. Methods requiring a test vehicle are floating-car technique, average-speed technique, and moving-vehicle technique.

7. Floating car method is also known as _____
a) Average speed method
b) Moving vehicle method
c) License plate method
d) Riding check method

Answer: d
Explanation: Floating car method is also known as Riding check method. In a floating car method, the driver floats with the traffic by passing as many vehicles as possible without compromising on safety.

8. Detailed observation is acquired from the floating car method.
a) True
b) False

Answer: a
Explanation: “Detailed observation is acquired from the floating car method” is a true statement. It records details concerning all phases of speed and delay which also includes location, duration, and cause of delay.

9. Which of the following data is not recorded by the observers during a floating car method?
a) Number of vehicles overtaking the test vehicle
b) Number of vehicles overtaken the test vehicle
c) Number of vehicles travelling in the opposite direction
d) Number of pedestrians

Answer: d
Explanation: Number of pedestrians is not recorded by the observers during a floating car method. The number of vehicles overtaking the test vehicle, the number of vehicles overtaken the test vehicle, and number of vehicles travelling in the opposite direction are some of the observations recorded by the observers.

10. Which of the following a disadvantage of methods with test vehicles?
a) Data storage difficulties
b) Low initial cost
c) Consistent data collection
d) Detailed data

Answer: a
Explanation: The disadvantage of methods with test vehicles is the data storage difficulties due to advanced and detailed data collection techniques. Other disadvantages are regular quality checks due to human and electric sources errors.