ADWA –ADIGRAT ROAD PROJECT
This is a World Bank funded project that involved road construction and rehabilitation works for the upgrading of a section of the road, approximately 108 kilometres in length, from Adi Abun to the western outskirts of Adigrat, from gravel surfacing to bituminous pavement.
The work included horizontal and vertical alignment improvements, rehabilitation of existing culverts and bridges, construction of new culverts and bridges, and pavement overlays of the existing pavement in the town of Adwa. The terrain varies from flat/rolling to hilly and mountainous.
The works construction was supervised using contract documentation prepared using World Bank standard documentation, based on the use of the FIDIC 4 Conditions of Contract.
Because the route of the road passes through some areas of
difficult terrain, there are sections of the road for which the contractor was unlikely to be able to provide diversion roads.
Some working under traffic is therefore probable. In one or two cases, in which hairpin stacks have been employed to negotiate particularly difficult terrain, even working under traffic may be impractical. In these areas it was necessary to allow short periods
in which public traffic is halted during some key construction operations. In steep hair-pin stacks, conventional pavement construction was considered inappropriate and instead a
dense bitumen macadam with low viscosity was used.
This road has contributed significantly to reviving the economy
of Tigray region of Ethiopia that suffered from decades of conflict and war.
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