Humvee M1025

The HMMWV (High Mobility Multipurpose Wheeled Vehicle) M1025, or Humvee, is a military light armored utility vehicle which is owned by Rika Minami. The Humvee is driven by Shizuka Marikawa as she and the rest of the group escape from Rika's house, and it serves as their primary means of transportation until they reach the Takagi Estate.

Trivia
In the anime it is being used by the main characters to leave Takagi estate, while on the manga it was the Argo 8x8 Military Proto