The Joint Light Tactical Vehicle (JLTV) is a joint program currently in development for the U.S. Army and Marine Corps. The JLTV will replace the High Mobility Multipurpose Wheeled Vehicle (HMMWV) aka the Humvee, which is the current light tactical vehicle used by the U.S. military.
The advent in Iraq and Afghanistan of remotely-controlled Improvised Explosive Devices (IED) has taken its toll on the fleet of unarmored flat-bottom HMMWVs, thus creating the need for a new light tactical vehicle with better protection. The HMMWV was never designed to withstand IED or mine blasts. HMMWV up-armoring through the addition of armor plates has provided increased crew protection, however, the increased weight has reduced the vehicle's payload carrying capacity, maneuverability, off-road mobility, and air transportability.
The JLTV concept is based on a family of vehicles focused on scalable armor protection and vehicle agility, and mobility required of the light tactical vehicle fleet. The JLTV will provide defensive measures to protect troops while in transport, increase payload capability, and achieve commonality of parts and components to reduce the overall life cycle cost of the vehicle. The JLTV project seeks to optimize performance, payload, and protection of the vehicle and crew while ensuring a design that is transportable by CH-47 Chinook, CH-53E/K, and C-130 Hercules and larger military transport aircraft.