The introduction of a dedicated rail link between Glasgow Airport and the city centre would significantly enhance regional transport connectivity. Rail-based access offers greater reliability and reduced journey time variability when compared to road-based modes, particularly during peak periods. Integration with the existing national rail network, and potentially the future Clyde Metro network would improve intermodal connectivity, providing seamless travel for both domestic and international passengers, as well as for airport employees. 

Improved rail connectivity to Glasgow Airport would enhance the city’s attractiveness as a destination for tourism and international investment. Having a world class transport network as a whole could open the door to the city becoming more attractive to tourists. Efficient airport access is a key factor in regional economic competitiveness. The development and operation of GARL would generate employment opportunities and support economic growth while enabling airport expansion without a corresponding increase in road congestion. 

The Rail link would contribute to a reduction in road traffic volumes associated with airport access, thereby lowering greenhouse gas emissions and local air pollution. Rail transport represents a more energy-efficient mode of travel per passenger kilometre than private car use. The project would give passengers and airport workers more green options, which will also help reduce congestion on the M8 motorway.