**Special vehicles** are exempt from complying with some of the technical conditions required by regulation. This is because these vehicles, which are used to carry out works or provide special services on the roads, have specific characteristics and functions that require certain exceptions.

- **Special vehicles**: These vehicles must have a yellow light on while performing improvement or maintenance work on the road. This light is a safety measure to alert other drivers of their presence. Additionally, they have a maximum permitted speed of 40 km/h, indicating that they are not subject to the same speed regulations as other vehicles.

- **Priority in narrow areas**: Special vehicles that exceed standard weight and dimensions have priority to pass through narrow areas. This suggests that these vehicles may not comply with standard weight and dimension regulations due to their special nature and function.

In summary, special vehicles are exempt from complying with some technical conditions due to their specific function on the road, which justifies the correct answer: **Yes**.