e-mosty March 2018. Naeem Hussain. Bridges. Naeem Hussain. Bridges. | Page 27

I. Brunei Temburong Bridge Brunei is located on the north coast of the island of Borneo. Apart from its coastline on the South China Sea, it is completely surrounded by the Malaysian State of Sarawak, and since 1890 it has been separated into two parts by Sarawak, Figure 56. and supervise the construction of the dual 2-lane expressway link with a total length of approximately 30km between Muara district and Temburong District, Figure 57. Figure 57: Components of the Link The link comprises of approximately 3km of tunnels and viaducts in Muara, 14km of marine viaduct across Brunei Bay, two navigation channel bridges and 12km of low height viaduct across the mangrove and swamp forest in Temburong. Figure 56: Brunei on the map The physical separation of Temburong District from the majority of Brunei has significantly affected the e conomic development of Temburong and Brunei as a whole. The travel to Temburong from the capital Bandar Seri Begawan (BSB) by land requires passing into and out of Sarawak with a journey time that can take up to four hours. The alignment across Brunei Bay is in an S-curve to give interesting views of the navigation channel bridges and the varying coastline, Figure 58. Alternatively it is possible to travel by speedboat across Brunei Bay with very limited capacity. Neither of these alternatives offers 24 hour a day accessibility. In 2010 following a selection process, Arup were appointed by the Public Works Department (PWD) as the consultant to undertake a comprehensive socio- economic and engineering feasibility study to provide a fixed link between BSB and Temburong. The conclusion of the study was that the project is technically feasible, economically viable and that the environmental impacts can be managed or mitigated. PWD then appointed Arup to carry out the final design 1/2018 Figure 58: Curved alignment across the bay