What requirement is there regarding the height of the middle stoplight?

The requirement that the middle stoplight must not be higher than the vehicle is centered around ensuring visibility and effective signaling to other drivers. A middle stoplight that is positioned too high may not be easily seen by vehicles behind, especially in conditions where their view might be obstructed by the height of the vehicles in front. This positioning rule enhances road safety by making sure that brake signals are clearly visible to drivers who may be following closely.

In contrast, allowing the stoplight to be at any height could lead to situations where drivers do not see it, thereby negating its purpose. Having it higher than the rear lights could also contribute to visibility issues. Additionally, having it lower than the front lights could confuse following drivers and lessen the clarity of the signaling, further emphasizing the importance of maintaining the specified height in relation to the vehicle overall. This regulation ultimately aims to enhance communication between drivers on the road.