Does the district government have the right to entrust the national highway to the property management?

Freeways are managed by specialized road administration units, but the district government cannot manage the right of way. So what you are talking about should not be entrusting a property management company to manage roads, but other businesses. For example, the greening irrigation of trees and plants on both sides of the road, the cleaning of sidewalks, the cleaning of roadside rainwater wells and so on. These jobs can be entrusted to property management companies.