Construction firm Costain PLC (LON:COST) has won a £150mln contract to redevelop the Gatwick Airport station.
Network Rail Southern Region has appointed Costain to carry out work to expand capacity at the station.
READ: Costain shares plunge as project delays hurt revenue
Work is expected to start in early 2020 and will take about two years to complete.
"The development at Gatwick will transform the existing station and provide a greatly enhanced experience for airport and passengers,” said chief executive Alex Vaughan.
"Costain's extensive capability to deliver complex programmes, using leading edge smart technology, will ensure travellers are kept moving at every stage of the works, minimising disruption during this capacity-critical redevelopment."
Shares fell 2.2% to 178p in morning trading.