Due to the airport's proximity to Central London, it has stringent rules imposed to limit the noise impact from aircraft operations. This, together with the physical dimensions of the long runway and the steep glideslope, limits the aircraft types that can use London City Airport. The size and layout of the airport and overall complexity caused by the lack of taxiways mean that the airport gets very busy during peak hours. The air traffic controllers have to deal with over 38 flights an hour on a runway requiring a lengthy backtrack for each aircraft needing to depart from runway 27 or land on runway 09. Operations are restricted to 06:30 to 22:30 Monday to Friday, 06:30 to 13:00 on Saturdays and 12:30 to 22:30 on Sundays. These restrictions are related to noise.