Prior to Issuing a Taxi Clearance

Prior to issuing a taxi clearance, AERODROME CONTROL TOWER shall determine where the aircraft concerned is parked. Taxi clearances shall contain concise instructions and adequate information so as to assist the flight crew to follow the correct taxi routes, to avoid collision with other aircraft or objects and to minimize the potential for the aircraft inadvertently entering an active runway.

The clearance limit of taxi instruction is one of the holding points contained in table 2 on page 28.

When a taxi clearance contains a taxi limit beyond a runway, it shall contain an explicit clearance to cross or an instruction to hold short of that runway. For example :

a) If the clearance limit for departing aircraft is holding point W5/E5 the taxi clearance : [C/S] CLEARED TO HOLDING W5 VIA TAXIWAY ALPHA HOLD [REPORT] ON SHORT RUNWAY 07.

b) If the clearance limit for taxiing aircraft from main apron is west/east apron : [C/S] CLEARED TO WEST APRON VIA TAXIWAY DELTA AND CHARLIE HOLD [REPORT] ON SHORT RUNWAY 34L

Table 2 Clearance limit of taxi instruction (ID)

A taxi route should, whenever possible, be described by use of taxiway and runway designators. Other relevant information, such as an aircraft to follow or give way to, shall also be provided to a taxiing aircraft.

For the purpose of expediting air traffic, aircraft may be permitted to taxi on the runway-in-use, provided no delay or risk to other aircraft will result.

If AERODROME CONTROL TOWER is unable to determine visually that a vacating or crossing aircraft has cleared the runway, the aircraft shall be requested to report when it has vacated the runway. The report shall be made when the entire aircraft is beyond the relevant runway-holding position.

Aircraft shall not be permitted to line up and hold on the approach end of a runway-in-use whenever another aircraft is affecting a landing, until the landing aircraft has passed the point of intended holding.

Read Helicopter Taxiing Operations