Which of the following statement(s) is/are incorrect regarding methods used for Origin–Destination (O–D) survey? (i) Floating car method (ii) License plate method (iii) Home interview method (iv) Tag-on-car method
- AOnly (i)Correct
- B(i) and (ii)
- C(ii) and (iii)
- D(i) and (iv)
Solution
Concept
Methods of Origin and Destination (O-D) surveys vs Speed-and-Delay studies
Formula
NONE
Step-by-step solution
1. Evaluate each survey method: - (i) Floating car method: Used in travel time and delay studies where a test vehicle floats with traffic, not for O-D data (Incorrect statement). - (ii) License plate method: Observers record registration plates at cordon boundaries to trace origins and destinations (Valid O-D method). - (iii) Home interview method: Comprehensive sample survey of household trip generation and O-D patterns (Valid O-D method). - (iv) Tag-on-car method: Pre-coded tags are placed on vehicles at entry cordons and retrieved at exit cordons (Valid O-D method). 2. The question asks for incorrect statement(s) regarding O-D methods. Only (i) is incorrect. Answer: A
Explanation
Origin-Destination (O-D) surveys are conducted to determine travel patterns, trip origins, and destinations across a transportation network. Recognized O-D survey techniques include the License plate method, Home interview method, Tag-on-car method, Roadside interview method, and Return postcard method. In contrast, the Floating car method is a speed and delay survey technique used to determine travel time and delay characteristics along a route, not an O-D method. Thus, only statement (i) is incorrect.
Why the other options are wrong
B) Incorrect: License plate method is an established O-D survey technique. C) Incorrect: Both license plate and home interview methods are standard O-D surveys. D) Incorrect: Tag-on-car is a recognized cordon O-D method.
Shortcut
Floating car = Speed & Delay study; License plate, Home interview, Tag-on-car = O-D surveys.
Common mistake
Assuming Tag-on-car is not an O-D survey method, or mistaking speed and delay methods for O-D survey techniques.
Correct answer: A) Only (i)