Traffic Engineering & Road Drainage Quiz

Traffic Volume Study is a process of collecting traffic data over a specific period, such as volume, speed, and vehicle types, to understand traffic flow patterns and trends.

PCU stands for Passenger Car Unit, a metric used to measure the capacity of a road based on the equivalent number of passenger cars. One PCU is equal to the space occupied by one standard passenger car.

Factors affecting PCU include the vehicle's size (e.g., bus, truck, motorcycle), maneuverability (e.g., turning radius, speed), and occupancy (number of passengers).

Traffic volume counting involves measuring the number of vehicles passing a specific point on a road during a chosen period. Different methods can be used like manual counts, automatic traffic counters, and video analytics.

Road signs provide information and instructions for drivers, such as speed limits, warnings, and directions.

Grade intersections are at-grade intersections where traffic flows at the same level. This type of intersection may cause conflicts due to lack of vertical separation.

Grade-separated intersections are designed to separate traffic flows vertically, minimizing conflicts between crossing traffic. This design often includes overpasses, underpasses, or flyovers to separate different levels of traffic.

A rotary island, also known as a traffic island, is a roundabout intersection with a central island where traffic circles in one direction around the island.

Road intersections are points where two or more roads converge. Different types include at-grade intersections, grade-separated intersections, rotary islands (roundabouts), T-intersections, and Y-intersections.

Drainage is the process of removing excess water from roads and surrounding areas. It is essential for preventing road damage, improving road safety, and ensuring proper drainage.

Different types of drainage used in road construction include surface drainage (e.g., gutters, ditches), sub-surface drainage (e.g., pipes, drains), and storm water drainage (e.g., catch basins, retention ponds).

Road drainage is crucial for ensuring the longevity and structural integrity of roads. Effective drainage prevents water damage, erosion, and potential road failures.

A speed limit sign indicates the maximum allowed speed limit for a particular road segment. It's indicated using a circular sign with a black number on a white background.

A no parking sign indicates that parking is prohibited in a particular area. It features a red circle with a diagonal line, often with a car symbol.

A narrow bridge sign warns drivers about a narrow bridge ahead. It depicts a bridge with a narrowed section, often with a yellow background.

A hairpin bend left sign warns about a sharp turn to the left. It shows a left-facing arrow with a curved path to indicate a sharp bend.

A left turn prohibited sign indicates that left turns are not allowed at a specific intersection. It typically features a red circle with a white diagonal line through a left-facing arrow.

A width limit sign indicates the maximum width of vehicles allowed to pass. It typically features a black rectangle with a white number representing the maximum width in meters.

A compulsory ahead or turn right sign directs traffic to proceed straight ahead or make a right turn. It usually features an arrow pointing straight ahead or to the right, often in blue or green within a white circle.