In what situation is it permitted for heavy vehicles to drive in a lane other than the right lane?

Heavy vehicles are generally required to remain in the right lane to ensure smoother traffic flow and enhance safety on the road. However, specific circumstances allow them to use other lanes. The permissible situation for heavy vehicles to drive in a lane other than the right lane is when making a left turn. This is necessary because heavy vehicles often require a wider turning radius, and they must occupy the left lane to execute the turn safely.

In cases of overtaking another vehicle, using a lane other than the right lane may not always be appropriate or safe, especially considering the size and speed of heavy vehicles. When there is a lane closure, traffic regulations typically provide guidance to redirect heavy vehicles to appropriate lanes but do not inherently allow them to occupy other lanes without noting specific reasons. Lastly, signaling a lane change is a routine part of driving and does not inherently justify the need for a heavy vehicle to be in any lane other than the right unless specifically intended for maneuvers like turning left.