Arrived and no sign of shuttle buses (saw two parked at customer service building) so walked briskly for 5 mins to airport. Upon return at night I could see many signs for other shuttles but not for long stay and no one in airport could direct me. There was no sign at the pay station to say where the shuttle pick up was. So I walked in the dark and cold. It seems the shuttle comes to the entrance at the international arrivals and they only send bus if they see someone on CCTV waiting there. So, feedback is better signage to shuttle pick up from both ends of airport and if a car drives in to carpark, assume they will want a shuttle and set off please .