Kontroll och uppföljning av entreprenader - del 1, dagens krav och metoder: Vägytemätning med mätbil

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Thomas Lundberg
Christian Glantz

The Swedish Transport Administration aims to increase the number of design build contracts. To get a functioning control device around the contracts, well defined requirements must be set for the warranty period of the road. In this survey we focus on functional requirements that are set for design build contracts and which can be checked by means of a road surface testing. The report highlights what requirements are used and how they are checked, but it also takes up subjectively assessed requirements that should be replaced by an objective method.

Furthermore, important aspects of the implementation of a contract are described. The contact between the measuring supplier and the contractor is extremely important for determining when, how and where the controls are to be performed. A total contract often contains several roads, ramps and so forth, which requires its special planning and control routines.

A review is made of defects that can occur on design build contracts and at what stage they occur (construction stage/use stage). For many of the defects identified there is no established objective measurement method. Therefore, usable methods need to be further developed and verified.

Another important aspect of design build contract is how the requirements are set and followed up. Clear guidelines for the requirement setting should be worked out where it is decided which consideration should be taken, for example, for traffic volume, studded tires, signed speed and climate.

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