7 important factor affecting Roadworks cost estimation

7 important item that must be consider while doing cost estimation for road construction.

1. Cost of the construction material needed to construct a road.
2. Delivery cost for the construction material.
3. Machinery and labour cost involve during construction period.
4. material wastage, labour and machine inefficiency during construction. 
5. Increase of the price of construction material, Labour and machine in the near future.
6. indirect cost such as Insurance premium, material handling cost, safety and others.
7. profit margin.