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Upgrade to Freeway of TR1/6 Windhoek - Okahandja


Project Overview

As the first freeway construction project since Namibia’s independence in 1990, the 80 km long trunk road 1 section 6 between Namibia’s capital, Windhoek, and Okahandja, is being upgraded from a two-lane rural road to a dual carriageway freeway. The road is one of the five most-trafficked sections of the Namibian road network being used by commuters between Okahandja and Windhoek and forms part of the regional transportation routes between the port of Walvis Bay and neighbouring countries. The project is a key part of Namibia’s National Development Plan and Harambee Prosperity Plan programmes.

Construction is carried out in five sections, including the upgrade of the existing two-lane road and 21 km greenfield construction. The freeways programme includes the largest number of bridges being designed and constructed in Namibia since the 1960s and 1970s. These include rehabilitation and widening of three existing bridges and construction of nine new river crossing bridges, with two 280 m long bridges over the Swakop River at Okahandja. Nine twin-spine prestressed interchange bridges also form part of the structures scope. Roadworks entail fill, layer works and construction of crushed-stone base with Cape Seal surface treatment.

SMEC is providing all full-time construction supervision services on this project, including quality control of all road and structure works, such as survey, sampling and materials laboratory testing and daily inspection of work in progress for acceptance and progress control. Contract administration by SMEC’s team includes financial control; progress monitoring and reporting; and claims evaluation and resolution.

Our Role

VKE, part of the SMEC Group, was engaged in 2012 for the engineering design and contract administration for the upgrade to dual carriageway freeway of Trunk Road (TR)1/6 between Windhoek and Okahandja in five sections.

The assignment covers overall project management, fieldwork, data collection and analysis, including topographic survey, traffic engineering, geotechnical investigations for bridges, prospection for road construction material and coordination of EIA and EMP development. Engineering design by SMEC comprised of hydrology and drainage design, geometric design, pavement design, structural design, design reporting and contract documentation. Contract administration of FIDIC Red Book contract and construction supervision also form part of the engagement.

Location:
Namibia, Khomas and Otjosondjupa Region
Technical Area:
Transport
Client:
Roads Authority (Namibia)


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