Problems of Black Pavement Rehabilitation in Latvia

摘要

Presented article gives a general information on black pavement rehabilitation andrnalternative solutions of problems in Latvian road sector.rnLatvian Road Administration is responsible for 20 500 km of roads of which 7900 kmrnhave black asphalt pavements. In recent years the following negative trends arerndeveloping regarding the condition of these roads:rn1. condition of pavements continue to worsen as rehabilitation works are not carried outrntimely,rn2. maintenance works (e.g., pothole patching, crack filling, etc.) improve the roadrncondition only for one season.rnDue to scarce finances rehabilitation works were not carried out in full amount thusrnforming a repair deficit. At present the rehabilitation of 700 km of roads per year has tornbe carried out. In 1996 the repair deficit was 3600 km of 46% of all black pavements.rnTo improve the situation Latvian Road Administration has implemented PavementrnManagement System, established road research enterprise including central roadrnlaboratory and purchased a study on suitable asphalt technologies for Latvia.rnStill the main problem will be the lack of finances. Latvian Road Administration hasrnworked out different scenarios for budget development. Minimum scenario providesrnrehabilitation of 2150 km roads with greatest traffic intensity until the year 2000 andrnrequires 130 million USD. Maximum scenario provides the elimination of whole repairrndeficit and requires 556 million USD. For the improvement of finances excise tax onrnfuel will be increased each year until the year 2000 and loans from international banks -rnEBRD and the WB will be used.rnGeneral goals are not to allow further deterioration of pavements and to preserve themrnwith simple methods, e.g. surface dressings. Future techniques for maintenance wouldrnbe surface treatments and pothole patching. Also cold recycling is very prospective. Allrntechnologies have to be friendly to the environment and health.