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2. Cardiff Airport Shuttle Bus averages four passengers a journey;BBC News,2014
3. Airport requirements for leisure traveller;Brilha,2008
4. An exploratory examination of additional ground access trips generated by airport ‘meeter-greeters’;Budd;Journal of Air Transport Management,2016
5. An empirical examination of the growing phenomenon of off-site residential car parking provision: The situation at UK airports;Budd;Transportation Research Part A: Policy and Practice,2013