The assignment is for the cleaning of tunnels on national roads with the accompanying equipment and installations on the road network in accordance with the tunnel list given in chapter. D2-I and D2-S The work will be settled with a round sum for round sum processes, in accordance with quantities and unit prices for other processes and as maths works in accordance with hourly rates for crews and machines. The contract will be valid from 2026-11.01 until and including 2031-08-31 for all the assignments that have been described. The parties can, by agreement, extend the contract to also apply for a period of further 12, 24 or 36 months, cf. chapter C3, point 11. The builder has the option to extend the contract for 12 months, from and including 1 September in the the year the contract was agreed to end (i.e. either at the end of the original contract period, or at the end of the extended contract period in accordance with the previous section), up to and including 31 August the following year. Traffic on the road network varies from approx. AERT 1,200 to approx. AERT 23,000, and an annual traffic growth of approx. 1.5% is expected. The assignment includes cleaning tunnels and the accompanying technical equipment on the road network. The assignment also includes inspections and registration, planning of the business, documentation, reporting to the builder, information to the public and handling other assignments that are necessary for the work.