An environmental report,released on Wednesday by the NSW government,warns that substantial works will be needed on existing roads around the airport to build the motorway,forcing the closure of lanes on the busy Qantas Drive and Airport Drive for periods.
Construction will lead to extra congestion and delays for motorists and buses at intersections near the airport,especially those near the domestic terminals,the report shows.
Contractors will carry out short-term road and lane closures at night"as far as possible"to minimise disruption. However,the report warns that the use of cranes will"occasionally require full weekend closures"and traffic detoured to the airport terminals.
Unlike with WestConnex,motorists will not have to pay tolls to use the new motorway. The project will result in a widening of Qantas Drive from two to three lanes in each direction,and include a flyover viaduct from Qantas Drive to the two domestic terminals.
The environmental report warns that construction will lead to"temporary intrusions"into the airport's airspace and high-intensity approach lights for planes landing at the main runway,when cranes and other large equipment are used.
Night-time lighting for construction could also pose a potential distraction to pilots in"some areas".