AC 150/5]00-1 J CHG 12 

the siting and orienlalion of the visual screen. The vi~'Ulll 

scroen may have adveroe affecl.3 on navig11tional aids if il is 

r.ot sited properly. The uniqueness and complexity of the 

airport siting environment rcquire3 that all inBtaUation~ be 

addressed on a case-by-<:ase b83i~, !10 mitigatioo~ can be 

developed to cruvre the in.~tallation of the: visual scrcon does 

oor signir1cantly navigational aid pcrfonnanoo. 

(a) Approach Lt~t Plane. No part 

of the visual screen may penciJ'atc the approach light plane. 

(b) Radar Interference. Research 

has shown that a visual screen erected on an airport 

equipped with Airport Surfa<.:e Detection Hquipmenl 

(ASOI..l) may reflect signal~ that are adve~e to the ASDE 

operatioo. To avoid this, the visual screen should be 

tilted backJaway (on the side facing the ASDfi) 12 

degrees(± I 0 ) . Thi~ will rrunimitc or olil"tli.D&te false radar 

1/3/08 

targets generated by reflections off the screen surface . 

Ex¢mple& of this tilting are ~hown in figure 4-18 . 

(c) lnitrumcnt Landing Syatem 

(ILS) Interference. Research hal! ~hown that the 

rre.~ence of visual screens on a runway inatrurocnt.cd wilb 

an !LS system (localiur and glide alopo) will general ly 

not affect or interfere with the operation of the system. 

An analyais must be performed for glide slopes, 

especially null roforonco glide slope~. prior lo the 

installation of tho screens. The uniqueness and 

complexity of the airport siting environment requires that 

all installations be addressed on a case-by-case ba.~is, w 

rrutigations can be developed to ensure the installation of 

the visual screen doe; not significantly impact the 

performAnce of lhtl I LS. 

416. to 499. RESERVKD. 

Table 4-1. Taxiway dimensional standards 

J8 

ITEM DIM AIRPLANF. DESIGN GROUP 

ll I II lll IV y 

Tax

Vl 

iway Width w 25ft Jsn son 41 75 n 1s n 100 n 

Twway F.dge Safety Morgin 

7.5 m 10.5 m 15m1/ 23m 23m 30m 

J.j H\ 1.s n 10ft~/ 1s n 15 1\ 20ft 

TuiwAy Pavement 

1.5 TO 2.25 TO 3 en 11 4.5 en 4.5 en 1\m 

Fillet - Refer \o Table 4-2 - Conflgll111t ion 

TUIWI Y Shoulder Width 10 ft I 0 ft 20 ft 2~ ft 35ft~ 0ft~/ 

Tll..Xiway Safely Area Width 

Jro :len 6m 7.5 m \0.5 m~ 12m il 

11 <~9 n 79 1\ 11s n 171 1\ 214 n 262' f\ 

Tniway Object 

15m 24m J6 TO 52 ro 65 en 80 en 

flrcc Are~~ Wiulb 8911 131 11 186 ll 259 n 320ft 386 f\ 

TaxiiD.IIe Ohjoct 

27m 40m 57 m 79 m 97 m 11 8m 

Free Area Width 79ft 11 s ft 162ft 22~ ft 276ft 334ft 

24m 35m 49m 68 ID 84 [11 102m 

11 U:tters ~.:orrc~pond to the dimensions on figures 2-J IUld 4-l. 

Zl 

Ulx

For 

iw

a

ay 

irplanes 

width 

in A irplanc Design Group Ill with a wheelbase equal to or greater than 60 feet ( 18 m), the standard 

is 60 feet ( 18 m). 

21 Th

the 

e 

pavement 

taxiway edge 

edge

safety margin is the minimum acceptable distance between the outside of the airplane wheels a nO. 

. 

I 

safety 

Por airplanes 

margin 

in Airplane Design Group lll with a wheelbase equol to or greater than 60 feet ( 18 m), the taltiway edge 

is 1 S feet (4.5 m). 

~I 

C-onsideration 

Airplanes in Airplane Design Groups V and Vl normally requiro stnbili~d or paved taxiway shoulder surf~es . 

should be giv en to object3 ocar runway/taxiway/la;(iJaoe 

exboust wake from a 

intcrsoctlons, which can be impacted by 

tu rn ing oircrnft. 

~ceplllble 

The values obtained from the following equations may be used to show that a modification of ~tandards will provide an 

level of ~fety . Refer to puagrapb 6 for guidance oo modification of ~tandards requirements. 

Taxiway safety aro11 width equals the airplane Wingllpan; 

Tax iway OFA width equa l~ 1.4 times airplane wingspan plu~ 20 feet (6 m); and 

Taxi lane OFA width equa ls I .2 times airplane wingspan plus 20 feet (6 m). 

Chap 4