Aerial roof markings

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Aerial roof markings are symbols, letters or numbers on the roof of selected police vehicles, fire engines, ambulances, coast guard vehicles, cash-in-transit vans, buses and boats to enable aircraft or CCTV to identify them. These markings can be used to identify a specific vehicle, vehicle type or agency. The markings, depending on the vehicle, or information required, may also be displayed on the bonnet, boot, or other areas of the vehicle visible from the air.

Different state police forces in Australia use different aerial roof markings to designate specific vehicles, duty types and areas.

Local Area Commands vehicle bonnet/roof codes^[1]

AB	Albury	AS	Ashfield	BA	Barwon	BB	Botany Bay	BK	Bankstown
BL	Blue Mountains	BN	Blacktown	BR	Barrier	BU	Burwood	BW	Brisbane Water
CA	Campsie	CB	Canobolas	CC	Coffs/Clarence	CEH	Central Hunter	CF	Chifley
CM	Cabramatta	CN	Camden	CS	Castlereagh	CT	Campbelltown	CU	Cootmundra
DL	Darling River	DQ	Deniliquin	EB	Eastern Beaches	ES	Eastern Suburbs	EW	Eastwood
FA	Fairfield	FL	Flemington	FS	Far South Coast	GF	Griffith	GL	Gladesville
GN	Goulburn	GV	Green Valley	HB	Hawkesbury	HI	The Hills	HR	Holroyd
HS	Harbourside	HU	Hurstville	HV	Hunter Valley	JN	Junee	K	Kempsy
KU	Ku-Ring-Gai	KX	Kings Cross	LE	Leichhardt	LI	Lake Illawarra	LL	Lachlan
LM	Lake Macquarie	LP	Liverpool	MD	Mount Druitt	ME	Mudgee	MF	Macquarie Fields
MG	Manning/Great Lakes	MI	Miranda	ML	Manly	MN	Monaro	MNC	Mid North Coast
MR	Marrickville	NB	Northern Beaches	NTH	Northern Highway Patrol	NCC	Newcastle City	ND	New England
NS	North Shore	NT	Newtown	NTH	North	OR	Orana	OX	Oxley
PA	Parramatta	PE	Penrith	PTS	Port Stephens	QH	Quakers Hill	RB	Rose Bay
RF	Redfern	RH	Rosehill	RM	Richmond	RY	Ryde	SC	Sydney City
SG	St George	SH	Surry Hills	SM	St Marys	SU	Sutherland	SV	Shoalhaven
TB	Tweed/Byron	TF	Tenterfield	TL	Tuggerah Lakes	WG	Wollongong	WW	Wagga Wagga

Fire and Rescue NSW fit aerial identification markings to appliances that are indicative of the vehicles call sign. Example: "RP001" indicates the appliance is the Rescue Pumper belonging to station 001, the City of Sydney, while HH077 indicates the Heavy Hazmat support truck from St Marys fire station.

Fire and Rescue NSW aerial roof ID codes

AP	Aerial Pump	CT	Compressed Air Foam System (CAFS) Tanker	DC	Duty Commander
FIRU	Fire Investigations & Research Unit	H (HH)	Hazmat (Heavy Hazmat)	HH	Heavy Hazmat
HP	Hazmat Pumper	HT	Hazmat Tanker	ICV	Incident Control Vehicle
LP	Ladder Platform	LSV	Logistical Support Vehicle	P	Pumper
R (HR)	Rescue (Heavy Rescue)	RP	Rescue Pumper	RT	Rescue Tanker
SEV	Service Exchange Vehicle (spare)	USAR	Urban Search and Rescue

The New South Wales Rural Fire Service fits aerial identification numbers to rural fire appliances with the format consisting of the letter "B" (for Bush Fire) and the last 4 digits of the vehicles RTA approved operations plate. Example: "BF-07967" allocates an aerial ID of "7967". These markings do not denote a vehicles callsign.^[2]

The South Australian Country Fire Service have an infrared beacon on the roof of most new appliances and the vehicle call sign. As all trucks are named and numbered according to their location, capacity and capability (e.g. Hynam 34, Location: Hynam, 3000L, 4WD or Belair 34P, Location Belair, 3000L, 4WD, Pumper), their call sign is also placed on the roof of the cab in a red text on white roof fashion. Older State Emergency Service vehicles, primarily in country areas, may have their call sign on the roof as well.

Police vehicles in the United Kingdom have markings of symbols, letters and numbers on their tops to enable aircraft to identify them. These markings show the use of the vehicle, its force code and a vehicle identifying mark or the police division to which the vehicle belongs.

Not every vehicle displays markings, but those involved in response and traffic generally do. This factor stems from guidelines of the Association of Chief Police Officers relating to police air operations and pursuit management.^[3]

• Armed response vehicle (ARV) used by armed police from various police units – 5 point asterisk *
• General (incident response vehicle or area car)/Traffic – a circle symbol ●
• Dog support unit (DSU) – triangle ▲
• Public order (PO) personnel carrier – square ◼
• Police medics. Some policing vehicles like ARVs and IRVs may have major first aid and fire equipment installed with trained officers aboard – green cross +

On a typical vehicle roof layout, the vehicle usage marking is preceded by an integer PNC Force Identifier; the individual (and within each organisation, unique) Vehicle Identifier, commonly alphanumeric, should occupy a second line all by itself.^[3]

The Police National Computer (PNC) is used by UK police forces and other government agencies to store and retrieve data about people, vehicles, plant and government locations. Regarding roof markings, their inscription helps identifying the regional or institutional affiliation of each vehicle. PNC force codes are also used when custody records are created, when items are submitted to places such as the Forensic Science Service laboratory, when evidence is stored, or when documents are to be passed from one force to another. They also form the first two digits of any certificate issued under the Firearms Act since the introduction of the National Firearms Licensing Management System. For example, a licence issued by the Metropolitan Police will start with '02'.^{[citation needed]}

In 2004, the UK Home Office, under direction from the Technical and Training Committee of ACPO Air Operations were tasked with improving the recognition and identification of police vehicles amongst other traffic, particularly when operating at night. Colour images show the flashing blue lights but other details are lost, and a thermal camera image would show the vehicles and surroundings, but the livery and roofbar lighting could not be seen. The preferred solution was to make the police vehicle distinguishable when viewed with a thermal camera.

Working with Qinetiq, they developed a thermally reflective marking film and issued the publication "Thermal Roof Markings for Police Vehicles 43/04". These markings reflect infrared light back to the thermal imager, resulting in a contrast between the cold reflection and the ground or vehicle temperature. Being passive in nature, they require no activity on the part of the air observer or vehicle crew, nor any power from the vehicle.^[3][4]

From 2006 onwards, single and double-decker buses operating London Buses services began having their roofs painted in heat-reflective white as part of a scheme to cool down their interiors in hot summer weather.^[5] This would eventually coincide with the introduction of roof markings, as shown in the image opposite. The first three letters denote the operator (GAG is Go-Ahead Group) and the remaining letters and numbers are the fleet number (SEe200), which also appears on the front and rear of the vehicle.

From 2023, lozenge-shaped stickers denoting the type of fuel the bus runs on (grey for diesel and 'smart' or 'mild hybrids', orange for electric, blue for hydrogen), placed on the roof below the fleet number of the bus, were rolled out onto every London bus by Transport for London contracted bus operators for ease of identification by the emergency services.^[6][7]

Operator codes include:

• ARL, Arriva London
• GAG, Go-Ahead Group
• MTG, Metroline
• ABL, Abellio
• SCG, Stagecoach Group

In Germany, DIN 14035, "Dachkennzeichen für Feuerwehrfahrzeuge" (Roof Marking of Fire Engines), issued in November 1981,^[8] defines that fire engines should carry their registration plate number; these include the one-to-three letter abbreviation code of the corresponding Landkreis, thus making regional origin self-evident. The inscription is recommended to be at least 40 cm in size; the font color should, in terms of roof painting, be "white on red", or "black on white and aluminium/metallic".^[9]

As DIN standards are, however, not generally binding in Germany, but mere recommendations, the scheme is not used everywhere, with some fire companies preferring visually appealing inscriptions like company name or logo. Many others show their cars' radio call signs (traditionally "Florian ##", cf. de:Funkrufname); over the years, various local efforts have been made to match both designations, aided by district administrations that reserved registered car like designations on principle.^[9]

CEN 1789, "Medical vehicles and their equipment - Road ambulances", reissued in 2007, recommends in its "informative" annex A "Recognition", that roofs of ambulance vehicles should bear the Red Cross/Crescent Emblems or the Star of Life.

Aerial roof markings are used by Toronto Police Service (# of cruiser) and Toronto EMS (Toronto EMS with region and number) to provide identification from the air. In the Metro Vancouver, British Columbia area, the various police forces have their specific municipal code and vehicle number on the roof for airborne identification.

Media related to Aerial roof markings (vehicles) at Wikimedia Commons