Vulnerable Convoy

In a movie or TV show with police in them, any time a convoy transporting a prisoner or more is shown, it will almost always be attacked. Sometimes, a convoy may even be sent out for exactly this reason.

Occasionally, a convoy may not even need to be attacked. Something can simply go awry during the trip, especially if it involves prisoners, and the transports never make it.

For video games, this trope only applies if the player attacks a convoy. If the player is tasked with defending one, it's an Escort Mission.

Comic Books

 * In Post-World War Hulk, Bruce Banner is being transported in a convoy which gets attacked..

Live Action TV

 * In Numb3rs, Colby escapes his convoy with his cuff partner ridiculously easily.
 * 24. At the end of season 5, this is how  escapes. Also at the end of season 8, the ambulance convoy carrying, who was shot, gets attacked by a team sent to drag him to a remote area to execute him.
 * 24 uses it straight but also double subverts it during Season 8. Jack sends an ambulance carrying a captured villain to an hospital for treatment and interrogation, expecting that the villain's business partners will attack it to kill him and prevent him from talking to CTU. Unknown to them the villain is already dead and the ambulance is sent as a mobile bait. However, thinking that they are safer attacking the hospital once the villain is carried there, the partners leave the ambulance alone.
 * Done in an early episode of The Shield, with a van transporting evidence rather than one transporting prisoners. The catch: the attackers are none other than
 * In Castle they set up a prisoner transport with a decoy prisoner in order to catch a contract killer.
 * Several Doctor Who stories have attacks on UNIT convoys, usually transporting dangerous technology, including "The Ambassadors of Death" (space capsule containing alien visitors), "The Mind of Evil" (decommissioned nuclear missile), and "The Time Monster" (reinforcements). In "Battlefield", for a change, the convoy (transporting another decommissioned nuclear missile) just gets bogged down due to bad weather -- and then the villains discover it and attack.
 * An episode of The Pretender starts with a news report of this, which kidnapped the key witness in a mafia trial. The attack was planned by Jarod himself, who was told the aim was to rescue prisoners in a war.
 * On Strike Back Stonebridge and Scott are escorting a van transporting a prisoner when the van is blown up.

Film

 * The Fugitive. While being transported to jail, a fight breaks out on the prisoner bus which ends up killing the driver and causing the bus to topple onto train tracks, effectively forcing the protagonist to escape.
 * The Dark Knight, where it's done to lure out the Joker.
 * Mission Impossible III: the big bad has just been arrested, so naturally his convoy is attacked and he gets away.
 * The movie SWAT,
 * Die Hard 2. Terrorists take over an airport to free a drug lord being flown into the U.S. on a jet.
 * Patriot Games. While being transferred to Albany Prison on the Isle of Wight, terrorist Sean Miller's escort convoy is ambushed by his ULA comrades who kill the police officers and free him from custody.
 * James Bond movie Licence to Kill. Drug lord Franz Sanchez offers a reward to anyone who releases him from custody. During a prisoner transfer the convoy carrying him is attacked from the inside and he gets away.
 * The Gauntlet. Clint Eastwood's cop character must get a prostitute from Las Vegas to Los Angeles to testify in a mob trial. They're attacked several times en route.
 * Inverted in 16 Blocks. A one-man detail is assigned to take a prisoner downtown while escaping a gauntlet of angry rogue cops.
 * SWAT - The whole plot is effectively one long Escort Mission after the perp yells out while he's being carted away that he'll handsomely reward whomever busts him out.
 * Mr. and Mrs Smith - The first cracks in the titular title's relationships happen when they, except it turns out.
 * Iron Man - Tony Stark's convoy is attacked by terrorists while it's on its way back from a test fire demonstration.

Video Games

 * In some of the Grand Theft Auto games there is at least one mission where the player must attack a convoy:
 * In III, the main target in the convoy is an ambulance. And of course, in the very beginning, the prisoner convoy that carries the main character is attacked by drug cartels.
 * In Vice City, the player has to steal the tank from a miltary convoy.
 * In IV, Niko has to attack a prisoner convoy. In a twist, though, your actual intention is to kill the prisoner and dump the body after losing the police.
 * Red Faction. Guerrilla spawns EDF convoys and sure enough the player is expected to destroy them before they reach their destination.
 * Happens rather often in Just Cause 2.
 * In Far Cry 2, the weapons dealers ask the player to destroy convoys driven by their business rivals so that news weapons are unlocked. Strangely, the convoys never actually go anywhere, as they are alway endlessly driving around in a circle.
 * In Mirrors Edge, Faith intercepts a police convoy that transports her sister to prison after an unfair trial.
 * Happens in Great Train Robbery mission in Starcraft II .
 * Enemy supply convoys are frequent targets in the Naval Ops series, though not in the only game where the player is allowed to drive a submarine.
 * In the SNES version of the Area 88 shoot-em-up game (''UN Squadron Stateside), enemy supply convoys are a source of easy money (and extra lives for the patient).
 * The Collective Commander's convoy in Warzone 2100.
 * You have to stop a prisoner transport convoy in Star Wars Rogue Squadron.
 * In Silent Hill Downpour, the prison bus transporting protagonist Murphy Pendleton and other inmates from Ryall State Penitentiary to Wayside Maximum Security Prison takes a tumble and rolls off the road into woodland. Murphy wakes up and escapes the wreckage on foot, eventually arriving in Silent Hill.

Western Animation

 * The teen heroes of Young Justice were charged with guarding trucks containing the pieces of the disassembled Amazo android, a convoy that included decoys. Sure enough, the trucks carrying the deadly machine parts are attacked...by MONQUIS!
 * In the Generator Rex episode Badlands, Rex was part of a Providence convoy transporting unstable nanites and toilet paper. It isn't long before they are besieged by desert-dwelling anarchists.
 * The first episode of the G.I. Joe five-parter "Revenge of Cobra" opens with the Joes transporting a high-tech device, and a Cobra strike force attacking the convoy and making off with it (along with Duke and Snake Eyes).

Real Life

 * Truth in Television. In war, convoys are one of the favorite targets of guerilla fighters, especially supply convoys. For a while, the most dangerous job in Iraq was military truck driver.
 * Likewise at sea, especially during World War II and anywhere that there were pirates. After several years of the military refusing consider the Escort Mission, it finally became clear that it was necessary. As such, there were entire classes of ships that were designed to be "escorts". These tended to be built on the Zerg Rush principle: small and cheap individually, but meant to match U-boat "wolfpack" submarines one on one or surround and delay dreadnoughts until the convoy could get out of range. Of course, serving in one was the classic Escort Mission: not only were you escorting not one but a flock of merchant ships that couldn't take a hit and were likely to do something panicky and stupid when the shooting started, but you were doing it in a ship that was pathetically underpowered and undergunned compared to what you thought you were signing up for.