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Difficulty: MediumTraffic Calming and Road Surfaces

Match each traffic calming feature or specialized road surface with the correct driver action and hazard response.

  • Speed cushions in a 20 mph residential zoneDrive centrally over the raised section so wheels straddle it smoothly, avoiding sudden swerves into dedicated cycle channels.
  • Chicane traffic calming systemCheck priority signs, give way if oncoming vehicles have precedence, and navigate the offset curves at a steady, reduced pace.
  • Wet tram tracks embedded in urban asphaltCross the metal rails as close to a right angle as safe, avoiding harsh braking or steering to prevent wheel slip.
  • High-friction anti-skid surface approaching a pedestrian crossingRecognize the specialized aggregate designed to maximize tyre adhesion and reduce braking distances in emergency stops.

Answer

Speed cushions match driving centrally to straddle the cushion safely; chicanes match checking priority signs and negotiating curves smoothly; wet tram tracks match crossing at right angles to prevent slip; and high-friction surfacing matches recognizing enhanced grip on hazard approaches.
Each traffic calming measure and surface type requires a distinct driving response: speed cushions must be straddled centrally to protect cyclists; chicanes require obeying priority signs and negotiating curves at low speed; wet tram tracks demand a perpendicular crossing angle to avoid skidding; and high-friction surfacing provides increased grip at critical braking zones.

Step-by-Step Solution

1
Identify the physical structure and intent of speed cushions versus other calming measures.
Speed cushions allow vehicles to straddle them centrally while leaving edge space for cyclists.
Correct alignment avoids suspension damage and protects cyclists in the kerbside gutter.
2
Evaluate the traffic management purpose of chicanes.
Chicanes require drivers to give way to oncoming traffic when indicated and steer through staggered obstacles at low speed.
They slow speeds by physically disrupting straight travel lines.
3
Assess the surface friction hazard of wet tram rails.
Metal tracks have very low friction when wet, requiring perpendicular crossing angles.
Crossing at shallow angles risks tyre slip and loss of steering control.
4
Determine the role of high-friction anti-skid surfacing.
It provides increased tyre traction to reduce stopping distance on critical approaches.
Installed at junctions and pedestrian crossings to reduce collision risk.

Key Concept

Appropriate vehicle handling and speed adjustment across varied traffic calming features and road surface conditions
Estimated Time:1m 0s
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Topics

Traffic Calming and Road Surfaces

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