1. Continuous Markings. These consist of a continuous double yellow line, with each line being at least
6 inches (15 cm) in width spaced 6 inches (15 cm) apart. They are used to define the taxiway edge from the
shoulder or some other abutting paved surface not intended for use by aircraft.
2. Dashed Markings. These markings are used when there is an operational need to define the edge of a
taxiway or taxilane on a paved surface where the adjoining pavement to the taxiway edge is intended for use by
aircraft (for example, an apron). Dashed taxiway edge markings consist of a broken double yellow line, with each
line being at least 6 inches (15 cm) in width, spaced 6 inches (15 cm) apart (edge to edge). These lines are 15
feet (4.5 m) in length with 25 foot (7.5 m) gaps. (See FIG 2-3-9.)
d. Taxi Shoulder Markings. Taxiways, holding bays, and aprons are sometimes provided with paved
shoulders to prevent blast and water erosion. Although shoulders may have the appearance of full strength
pavement, they are not intended for use by aircraft and may be unable to support an aircraft. Usually the taxiway
edge marking will define this area. Where conditions exist such as islands or taxiway curves that may cause
confusion as to which side of the edge stripe is for use by aircraft, taxiway shoulder markings may be used to
indicate the pavement is unusable. Taxiway shoulder markings are yellow. (See FIG 2-3-10.)

2-3-8

Airport Marking Aids and Signs