Road transport is, in the barest of sense, vehicles adapted for road use, although some may also possess off-road capabilities. Road transport is featured commonly in the Half-Life series as both a mode of transport as well as obstacles or cover.
 Types of road transport
The selection of road vehicles available in Half-Life are confined to those used by the Black Mesa Research Facility, as well as the Hazardous Environment Combat Unit and Black Ops. None of the vehicles can be driven, but some of them feature functional armaments (i.e. turrets) or contain supplies.
Road transport in the Research Facility relies on Black Mesa SUVs, used as an alternative to the Transit System for above ground transport, and Black Mesa trucks, armored vehicles transporting goods that require special care.
Both the Hazardous Environment Combat Unit and the Black Ops use M44 cargo trucks to transport personnel and equipment. The M1A1 Abrams, a main battle tank, and the M2A3 Bradley, a military infantry fighting vehicle, are only used by the HECU.
 Half-Life 2 and its episodes
Whilst the player has no control of Combine vehicles, the Resistance owns several controllable road vehicles constructed using salvaged parts. The Resistance's vehicles in particular are integral to two storyline arcs in Half-Life 2 and Half-Life 2: Episode Two, during which they are used by the player to traverse great distances to a particular destination. The vehicles are indicated to be of utmost importance to the missions, as the player automatically fails if he manages to lose the vehicles by dropping it onto off-limits areas of the map (i.e. deep water or cliffs). They include the Scout Car, used on the Coast, and the Muscle Car, used in the Outlands.
The Combine notably uses Armored Personnel Carriers, which feature pulse rifles and a guided rocket launchers, and Advisor Platforms, needed to transport the Advisor pod. Interestingly, the second version of the APC, apparently based on the American V-100, can be seen above a crushed car in the Half-Life 2 chapter Anticitizen One.
In addition, civilian car wrecks exist throughout much of the games. These wrecks are primarily used as obstacles to the player, but may also be punted as heavy projectiles or used to plug Antlion Soldier holes in Half-Life 2: Episode One, both with the aid of the Gravity Gun; at the beginning of the episode, Gordon and Alyx are thrown inside a car wreck by Dog over a pit near the Citadel. Moreover, the car traps in Ravenholm employ wrecks to crush Zombies. With the exception of the hatchback wrecks, most road vehicle wrecks featured are East European in origin.
Although the game features no vehicles, a parking lot can be seen outside the Aperture Science Enrichment Center.
 Related Achievements
|Half-Life 2: Episode One|
|Car Crusher (5G)|
|Use the cars to squash 15 Antlions in Episode One.|
 Behind the scenes
Half-Life 2 was originally to feature more road vehicles. These include several brush sedans, vans, and trucks, the AirEx Truck, which was to be seen in the Air Exchange, School Buses, apparently to be used by the Combine as the primary local Citizen transportation in City 17, Merkava, a Combine battle tank, and the Combine SWAT Truck, which can be found as concept art in Half-Life 2: Raising the Bar.
The Episode Two car was originally a Volkswagen Beetle in a poor condition, named "Jalopy". The team decided to redesign it so that players would feel excited rather than disappointed when they saw the car.
An unknown open-air Aperture Science car was to be seen in a diorama exhibit sequence cut from Portal 2. It features two seats and an "Area 20" label on the front and the back.
 Half-Life 2
The AirEx Truck.
Trucks blocking the road to New Little Odessa.
Sending a car flying with two weld tanks attached to it with the Physgun in the map "
 Half-Life 2 episodes
 Portal and Portal 2
 Half-Life 2
An Advisor Platform pulled by an APC.
Volkswagen Golf Mk2 wreck.
Ditto, in the Wasteland.
Moskvitch 2140 wreck.
Volga GAZ-24 wreck.
On The Terminal.
ZAZ-968 Zaporozhets wreck.
RAF-2203 Latvija wreck.
Avia A31 wreck.
LIAZ Škoda 706 RT wreck.
Car wrecks at Shorepoint.
Wrecked vehicles blocking the road near Dock 137.
 List of appearances
- Half-Life: Day One (First appearance)
- Half-Life: Opposing Force
- Half-Life: Blue Shift
- Half-Life: Decay
- Half-Life 2
- Half-Life 2: Raising the Bar
- Half-Life 2: Episode One
- Half-Life 2: Episode Two
- Portal (Car park only)
- PotatoFoolsDay ARG
|Vehicles, vessels and transportation|
|Aperture Science transportation||Borealis · Teleportation|
|Black Mesa transportation||Black Mesa SUV · Black Mesa Transit System · Black Mesa truck · Rail cart · Teleportation|
|Black Ops transportation||AH-64 Apache · M44 cargo truck|
|HECU transportation||AH-64 Apache · Jet · M1A1 Abrams · M2A3 Bradley · M44 cargo truck · Osprey Heliplane|
|Combine transportations||Advisor Platform · Armored Personnel Carrier · Hunter-Chopper · Razor Train · Teleportation|
|Resistance transportation||Airboat · Mil Mi-8 · Muscle Car · Scout Car · Teleportation|
|Xen transportation||Alien Craft · Teleportation|
|Trainstations||City 17 Trainstation · Depot · Technical Trainstation|
|Other||Rail transport · Road transport|
|Black Ops (cut)||Osprey Heliplane|
|Combine (cut)||AirEx Truck · C-130 · Combine SWAT Truck · M2A3 Bradley · Merkava · Osprey Heliplane · School Bus|
|Resistance (cut)||Borealis · C-130 · Jalopy · Jet Ski · Osprey Heliplane · Submarine|
|Other (cut)||Digger · Stealth|