The Public Works Authority (Ashghal) has completed 96% works of Umm Lekhba Interchange where the remaining bridges will be opened by the first quarter of 2021. This was revealed by Highway Project Department's project engineer Ali Saeed Ibrahim yesterday while announcing the opening of the seventh bridge at the interchange.
Once completed, Qatar's longest and vital interchange will significantly improve traffic and shorten journey time by more than 70%.
The bridges provide nine arteries that provide a free traffic flow in nine directions in addition to the free traffic on Al Shamal Road as well as the underpass of the old interchange linking Al Markhiya Street and Sabah Al Ahmad Corridor. The interchange features a sophisticated intelligent transport system wherein surveillance cameras, a vehicle number monitor, vehicle classification and emergency traffic system will be installed.
The new junction consists of an underpass extending 700m between Al Markhiya Street and Sabah Al Ahmad Corridor. The ground level consists of two loop bridges to Sabah Al Ahmad Corridor (bridge adjacent to Landmark Mall and another adjacent to Ezdan Mall to ease traffic pressure). The ground level also includes four bridges that provide free traffic flow and connects Sabah Al Ahmad Corridor to Al Shamal Road. The second level includes three bridges to ensure traffic flow to and from Al Shamal Road and connecting Al Gharrafa to Doha and Al Shamal Road to Sabah Al Ahmad Corridor.
The project includes an integrated drinking water network, electricity and treated water lines as well as an integrated rainwater and service water drainage. These are in addition to a sewage and drainage network, various communication networks and fibre optic cables. The construction of Umm Lekhba Interchange encountered many difficulties and challenges, according to Ashghal. To overcome the complex nature of the project, the 'precast segmental balanced cantilever' method was used. The reduction of space and the complex arrangement of bridges also necessitate the design of some bridges, extending long spans up to 90m in some cases, the longest in Qatar.