Depending on the airport, the taxiways may have letters, or descriptions (e.g.: Inner Taxiway) or each section of the airport may have a number (called blocks). At Heathrow, the last two are used, so a statement like 'taxi to block 76 via the outer taxi-way' would be valid. | Depending on the airport, the taxiways may have letters, or descriptions (e.g.: Inner Taxiway) or each section of the airport may have a number (called blocks). At Heathrow, the last two are used, so a statement like 'taxi to block 76 via the outer taxi-way' would be valid. |