In which type of transportation survey, the vehicles are stopped on a sampling basis and information is collected on the type of vehicle, origin, destination, trip purpose, etc?
Roadside interview survey
Understanding Transportation Survey Methods
Transportation surveys are essential tools used in transportation planning and engineering to gather data about travel patterns, modes of transport, trip purposes, origins, and destinations. This information helps in understanding current traffic conditions, predicting future travel demand, and planning improvements to the transportation network.
Different types of surveys are conducted depending on the specific data needed and the feasibility of the survey method.
Identifying the Survey Type
The question describes a survey where vehicles are stopped on a sample basis, and detailed information is collected from the occupants. This information includes:
- Type of vehicle
- Origin of the trip
- Destination of the trip
- Purpose of the trip
- Other related details like occupancy, frequency of travel, etc.
Let's analyze the given options to find which one matches this description.
Analysis of Options
1. Roadside interview survey: This method involves selecting specific locations on roads and stopping a sample of vehicles passing by. Trained interviewers question the driver or a passenger to collect detailed trip information, including origin, destination, purpose, vehicle type, etc. This description perfectly matches the scenario described in the question.
2. Taxi survey: This is a specific type of survey conducted to study the travel patterns of taxi users and taxi operations. While it might involve interviews, it is limited to taxis and not a general transportation survey method covering various vehicle types as implied by the question.
3. Tags on vehicles: This method typically involves attaching electronic tags or markers to vehicles to track their movement electronically across a network. It helps in understanding route choices and travel times but does not directly collect detailed origin, destination, or trip purpose information through stopping vehicles and interviewing people.
4. Registration number plate survey: This method involves recording the registration numbers of vehicles passing specific points at different times. By matching numbers recorded at different locations, travel paths and times can be estimated. Like the tags method, it tracks movement but does not involve stopping vehicles for detailed interviews about origin, destination, or purpose.
Based on the analysis, the method where vehicles are stopped on a sampling basis to collect information on vehicle type, origin, destination, and trip purpose through interviews is the roadside interview survey.
Key Information Collected in Roadside Interview Surveys
A roadside interview survey typically collects data points such as:
- Vehicle classification (car, truck, bus, etc.)
- Number of occupants
- Origin point of the current trip
- Destination point of the current trip
- Primary purpose of the trip (work, shopping, leisure, etc.)
- Frequency of the trip or route use
- Type of parking used at the destination (if applicable)
This rich dataset helps transportation planners understand travel demand patterns along specific corridors or within certain areas.
Revision Table: Transportation Survey Types
| Survey Type | Method Description | Data Collected (Typical) | Matches Question? |
|---|---|---|---|
| Roadside Interview Survey | Stop sampled vehicles; interview occupants. | Origin, Destination, Purpose, Vehicle Type, Occupancy. | Yes |
| Taxi Survey | Focuses specifically on taxis and their users. | Taxi trip data, user demographics, purpose. | Specific, less general than question. |
| Tags on Vehicles | Electronic tracking via tags. | Travel path, speed, travel time. | No (Doesn't involve stopping/interviewing for O-D-P). |
| Registration Number Plate Survey | Record number plates at survey stations. | Travel path, travel time, volume. | No (Doesn't involve stopping/interviewing for O-D-P). |
Additional Information: Related Survey Concepts
While the roadside interview survey is one method, other common types of transportation surveys include:
- Home Interview Survey: Interviews conducted at people's homes to collect detailed travel diaries for a specific period (e.g., 24 hours) for all household members. This provides comprehensive travel patterns for a study area.
- Cordon Line Survey: Surveys conducted at all entry and exit points (the 'cordon line') of a specific area (like a city center or a zone) to capture all trips entering or leaving that area. Roadside interviews can be a part of a cordon line survey.
- Screen Line Survey: Similar to a cordon line survey, but conducted along a line (e.g., a river, railway line) that traffic must cross, capturing all trips crossing that line. Roadside interviews can also be used here.
- Transit Survey: Conducted on public transport modes (buses, trains) to understand rider demographics, trip origins/destinations, purposes, and satisfaction levels.
Each survey method provides unique insights into travel behavior and is chosen based on the objectives of the transportation study.
Important Questions from Traffic Engineering
The minimum value of 15 minute peak hour factor on a section of a road is
In railways, the disc signals are provided for the purpose of
PIEV represents -
In which type of traffic signal system do signals along a given road shows the same indication (green, red, etc.) at the same time?
Select the correct match for the given information.
1. Regulatory sign
A. Prohibitory signs, restriction end signs, stop and give way signs, etc.
2. Warning signs
B. cross road, side road right, narrow bridge, etc.
3. Informatory signs
C. Parking signs, flood gauge, facility information sign, etc.
