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Access Lane - An access lane is a rear or side lane providing access to parking on lots with street frontage and/or short connections between access places or access streets principally to facilitate movement of service and emergency vehicles.
Access Road - An Access Road is a road that provides access to abutting properties with amenity, safety and aesthetic aspects having priority over the vehicle movement function. These roads are bicycle and pedestrian friendly. They are managed by local government.
Aggregate - Aggregate is a material composed of discrete mineral particles of specified size or size distribution, produced from sand, gravel, rock or metallurgical slag, using one or more of the following processes: selective extraction, screening, blasting or crushing. Aggregate is used in the construction of sprayed seals and in concrete mixtures.
Annual Average Daily Traffic - Annual Average Daily Traffic (AADT) is the total volume of vehicle traffic of a highway or road for a year divided by 365 days. AADT is a useful and simple measurement of how busy the road is.
Automated Car Convoy - An Automated Car Convoy is a string of computer controlled driverless cars slaved to the directions of the professional driver leading the group. The driverless cars maintain the correct speed and distance from the lead car.
Auxiliary Lane - An auxiliary lane is that portion of the carriageway adjoining through traffic lanes, used to separate either faster overtaking traffic or slower moving vehicles from through traffic, or for other purposes supplementary to through traffic movement.
Bitumen - Bitumen is a very viscous liquid or a solid, consisting essentially of hydrocarbons and their derivatives, which are soluble in carbon disulphide. It is substantially non-volatile and softens gradually when heated. It possesses waterproofing and adhesive properties. It is obtained from native asphalt or by processing the residue from the refining of naturally occurring crude petroleum. Bitumen is used in the construction of Sprayed Seals.