NJDOT-Graphic Information System

This is a useful site if you wish to get detailed roadmaps of NJ in pdf format. Here is a sample of maps available

State Maps

Airports and Heliports
Congressional Boundaries
Legislative Districts
Highway System
NJDOT Regional Boundaries
NJ State Transportaton Map - Front
NJ State Transportaton Map - Back
Park & Ride Locations
Political Subdivision with Roads
Political Subdivision w/o Roads
State Railroad Lines

The maps will only name major roads, but I think you will find these maps useful if you travel within New Jersey