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Princes Highway
The Princes Highway is a major arterial road in southeastern Australia running from Sydney through the NSW South Coast and Gippsland to Melbourne, opened in 1920 and named for the Prince of Wales.
Probationary driver licence
A probationary driver license is a restricted license for newly tested drivers, the middle stage of graduated driver licensing in countries including Australia, Canada, and the UK.
Production car speed record
The production car speed record is the highest verified top speed of a street-legal series-production car, with the SSC Tuatara's 455.3 km/h the fastest two-way average.
PROSPER (traffic engineering software)
PROSPER is a traffic signal optimization tool within the TRANSYT product line of TRL Software, used for designing signal timings from single junctions to large networks.
Protected-permitted left turn
A protected-permitted left turn (PPLT) is a traffic signal phasing mode where left-turning drivers get a protected green-arrow phase plus a permissive interval requiring them to yield.
Proton Saga
The Proton Saga is a compact sedan produced by Malaysian carmaker PROTON since 1985, when it launched as Malaysia's first national car, based on the Mitsubishi Lancer Fiore.
Proton Satria
The Proton Satria was a three-door hatchback made by Malaysian carmaker Proton: a Mitsubishi Mirage-based model from 1994 to 2005, then the in-house Satria Neo.
Proton Wira
The Proton Wira, known as the Proton Persona in the United Kingdom, is a Malaysian compact sedan and hatchback based on the Mitsubishi Lancer, produced from 1993 to 2009 with over 950,000 units sold.
PSA EW/DW engine
The PSA EW/DW engine is a family of petrol (EW) and diesel (DW) engines powering Peugeot and Citroën models like the 307, 407, C4, and C5.
PSA Group
PSA Group, legally Peugeot S.A., was a French multinational automaker that owned Peugeot, Citroën, DS, Opel, and Vauxhall until merging with Fiat Chrysler to form Stellantis in 2021.
PSA TU engine
The PSA TU engine is a family of small four-cylinder petrol engines developed by PSA Peugeot Citroën, launched in 1986 on the Citroën AX and displacing 954 to 1,587 cc.
PT-91 Twardy
The PT-91 Twardy (PT-91) is a Polish main battle tank of the early 1990s, a deep modernization of the Soviet T-72M1 with Polish fire control and reactive armor.
PTV VISSIM
PTV VISSIM is a commercial microscopic traffic simulation software by Germany's PTV Group, first released in 1993, that models cars, buses, cyclists, and pedestrians individually.
PTV VISUM
PTV VISUM is a Windows-based software package for transportation planning and travel demand modeling, published by PTV Group and used by about 4,000 customers in roughly 110 countries.
Public transport
Public transport, also known as public transportation or mass transit, is shared-ride service open to the public, including buses, light rail, metros, and commuter rail.
Public Works Department (Malaysia)
The Public Works Department of Malaysia, known locally as Jabatan Kerja Raya (JKR), is the federal department responsible for public infrastructure, including roads, buildings, airports, ports, and jetties.
Puerto Rico Highway 52
Puerto Rico Highway 52, officially the Luis A. Ferré Highway, is a toll highway running 67 miles from San Juan to Ponce, the island's longest toll road.
Puerto Rico Highway 53
Puerto Rico Highway 53 (PR-53), officially the José Celso Barbosa Highway, is a toll expressway in eastern Puerto Rico running 59.3 km from Fajardo through Humacao to Yabucoa.
Puffin crossing
A puffin crossing is a British signal-controlled pedestrian crossing whose sensors detect waiting pedestrians, varying the crossing time and canceling calls when someone walks away.
Pursuit Special
The Pursuit Special, known as the V8 Interceptor, is the black modified Ford Falcon XB GT Coupe driven by Max in the Mad Max films.
Purvanchal Expressway (पूर्वांचल एक्सप्रेसवे)
The Purvanchal Expressway (पूर्वांचल एक्सप्रेसवे), originally the Lucknow-Azamgarh-Ballia Expressway, is a 341 km six-lane expressway in Uttar Pradesh, India, from Lucknow to Ghazipur, inaugurated by Prime Minister Narendra Modi in November 2021.
Qingqi
Qingqi (轻骑, "light cavalry") is a Chinese motorcycle brand founded in Jinan, Shandong, in 1956, whose name became the generic Pakistani term for a motorized rickshaw.
Quadcam engine
A quadcam engine is an internal combustion engine fitted with four camshafts: a double overhead camshaft head on each bank of a V or horizontally opposed engine.
Quarter car model
The quarter car model is a simplified vehicle dynamics model of one wheel, its suspension, and a quarter of the body, used to study ride comfort.
Quattro (four-wheel-drive system)
Quattro is Audi's permanent all-wheel-drive system, first shown in 1980 in the original Audi quattro, whose rally successes from 1981 made four-wheel drive the standard in top-level rallying.
Queue warning
A queue warning system detects slow or stopped traffic in real time and warns approaching drivers through message signs or variable speed limits to reduce rear-end crashes.
R504 Kolyma Highway (Федеральная автомобильная дорога «Колыма»)
The R504 Kolyma Highway, or Road of Bones, is a federal highway in the Russian Far East linking Yakutsk and Magadan, built largely by Gulag prisoners.
Racing bicycle
A racing bicycle, or racing bike, is a lightweight bicycle with drop handlebars and narrow high-pressure tires, designed for speed on paved roads and shaped by road racing rules.
Racing Bulls VCARB 02
The Racing Bulls VCARB 02 is a Formula One car raced by Visa Cash App Racing Bulls in the 2025 season, with drivers Yuki Tsunoda and Isack Hadjar.
Racing Bulls VCARB 03
The Racing Bulls VCARB 03 is a Formula One car built by Visa Cash App Racing Bulls for the 2026 season, powered by the first Red Bull Ford engine.