UK engineering consultancy Hyder has won a $112m contract from Ashghal for the design and construction supervision of a new section of the Doha Expressway projects.
Hyder's scope, split into four separate projects, includes the concept design review, preliminary and detailed design, construction contract preparation, tender services and construction supervision services, the company said on Wednesday.
In a statement, it said it would be working on Al Khor Bypass, which includes 35km of expressway, the Al Khor Expressway and Al Khor to Umm Birkah Road, which includes 13 major junctions.
Hyder's scope includes construction supervision services for the Lusail Development External Road Phase 1 and Phase 2, it added.
"We are pursuing a number of important opportunities in Qatar and the Expressway Projects constitute the largest single win in the current financial year. Our Middle East results are progressing ahead of schedule and remain well beyond those from last year," said Ivor Catto, CEO of Hyder.
The Expressway projects is the second largest contract to be awarded to Hyder since the announcement of Ashghal's C2 project in November 2011, he added.
Wael Allan, regional managing director, said the Expressway projects "will improve traffic flow, increase safety, reduce congestion and lessen travel times".
The programme as a whole consists of 28 projects which require both the delivery of new roads and the upgrading of existing roads to "expressway" standard.
Hyder Consulting has previously worked on Burj Khalifa, Dubai; Crystal Palace, London; Tower Bridge, London; Sydney Harbour Bridge, Australia; and Emirates Towers, Dubai.
The London-based company employs over 1,450 staff in the Middle East and regional revenues totalled £63.8m in 2012.