1. There is no specific quota for municipal road shoulders, but only 20 12 municipal quota for sidewalk shaping and rolling, which is included in the square, and earthwork is included in the subgrade and pavement.

Second, the role of the shoulder:

Protect the stability of major structures such as lanes;

Provide location for vehicles that need temporary parking due to mechanical failure or emergency;

Provide lateral margin, which is beneficial to safety and increase comfort;

For pedestrians and bicycles;

Provide the location for setting up road facilities;

As a workplace for maintenance operations;

On the premise of not destroying the highway structure, it can also be used as the location for burying underground facilities;

Improve the curve sight distance of excavation section and improve traffic safety;

Rainwater can be drained away from the roadway to reduce rainwater infiltration into the roadway and pavement damage.