New Jersey Turnpike

In the early 2000s, Major C Jones and her colleagues were killed in an incident at a tollgate in New Jersey. It came as a complete surprise to everyone at UNIT. (PROSE: UNIT's New York Operation Expansion)

Behind the scenes
Whilst not named directly in PROSE: UNIT's New York Operation Expansion, the Jersey tollgate is called the ; it has an infamous reputation, and is likely the UNIT personnel were killed in a road accident.