Arlington Municipal Airport Development Plan Arlington Airport Development Plan | Page 164
When planning for landside facilities, consideration must also be given to the design standards for sep‐
arating structures. The taxiway object free area (TOFA) is the area required to be clear of object pene‐
trations surrounding taxiways. For ADG II aircraft, the TOFA is 131 feet wide as centered on the taxi‐
way. For ADG III aircraft, the TOFA is widened to 186 feet. Currently, the ADG II and III TOFAs for par‐
allel Taxiway A are obstructed in various locations adjacent to the east side of the taxiway. The vehicle
drive lane on the main aircraft parking apron is located approximately 40 feet east of the taxiway cen‐
terline and serves as a penetration to the ADG II TOFA. For ADG III, the drive lane and approximately
10 marked aircraft tiedowns are situated within the ultimate TOFA associated with Taxiway A. Farther
north, approximately 10 marked vehicle parking spaces adjacent to private conventional hangar devel‐
opment are located within the ADG II and ADG III TOFAs. The landside analysis later in this chapter will
discuss options for mitigating the separation deficiencies associated with parallel Taxiway A.
While these design standards should be implemented for all primary movement areas (e.g., parallel
taxiways, aprons), facilities not intended to serve the critical design aircraft can be designed to differ‐
ent separation standards. For example, an area that is planned for nested T‐hangars can apply differ‐
ent separation standards for smaller single engine aircraft.
HOLD LINE MARKINGS
The current hold line markings associated with Taxiways A, C, D, E, F, and A on the east side of Runway
16‐34 are located 250 feet from the runway centerline, which meets C‐II standards. The standard for
hold lines associated with an RDC C‐III runway is 250 feet, plus one foot for each additional 100 feet
above sea level. As depicted on Exhibit 4C, planning should consider relocating the hold lines on the
taxiways previously mentioned to a distance of 257 feet from the runway centerline to meet appropri‐
ate design standards. The hold line markings on Taxiways G, H, J, and G west of the runway, as well as
Taxiway B on the east side of the runway are located at 257 feet from the runway centerline, thus
meeting the ultimate marking standard for C‐III design.
AIRFIELD LIGHTING
During the course of the planning period, medium intensity runway lighting (MIRL) should continue to
be applied to Runway 16‐34 and medium intensity taxiway lighting (MITL) should be provided on all
active taxiways serving the runway system. In addition, the Airport should consider removing the in‐
candescent airfield lighting and signage systems, and replacing them with light emitting diode (LED)
technology.
The lighting upgrades could be undertaken on Runway 16‐34 and the taxiway system in the event that
they are widened to 150 feet and 50 feet, respectively. As discussed in Chapter Three, LED lighting has
many advantages, including lower energy consumption and longer lifetimes.
Chapter Four - 18