What is a "Plan X"? Is this when they shut down the highway and do not allow anyone on at the interchanges preceding the incident?
From a 1998 newsletter story on the turnpike website:
"When a major accident occurs, and/or if clean-up is going to take a long time, the Turnpike will put "Plan X" into effect. Plan X is a system developed to keep additional vehicles from entering the Turnpike and becoming part of the backlog. At times, some vehicles already on the Turnpike are required to exit to help relieve congestion.
"Since we are a limited access system, we don't let people get on the Turnpike at nearby interchanges until the traffic backlog has dispersed," Frank explained. "We give customers cards with maps and directions to use alternate routes. We also notify local police in those areas so they can deal with the additional traffic which flows through their towns."
The Turnpike is working on a plan to let traffic exit the highway through emergency gates which are located between interchanges. Future plans call for the installation of "slip" ramps in some areas. Such ramps would be located between interchanges and will ultimately be part of the Turnpike's electronic toll collection system. They will also be used to move traffic off the Turnpike when serious backlogs resulting from accidents occur."