DVDL Driving Practice Test 2026 – Complete Exam Prep Guide

The permitted colors for external lights on vehicles are white, red, and amber. White lights are typically used for headlights, providing visibility during nighttime driving. Red lights are often used for brake lights and tail lights, signaling to other drivers when a vehicle is stopping or slowing down. Amber lights have specific applications, commonly seen in turn signals and hazard lights, to indicate a vehicle's movements or to warn of potential hazards.

Other color options listed are not standard for vehicle lighting due to various safety regulations. For example, blue lights are generally restricted to emergency vehicles in many jurisdictions, representing a police or first responder presence. Green and yellow lights do have some specific uses but are not standard for general traffic vehicles. Meanwhile, black and orange are not used for external vehicle lighting, with orange sometimes used in cones or warning signs rather than on moving vehicles. By adhering to the standards of white, red, and amber lighting, vehicles can communicate their intentions clearly and maintain safety on the road.