It is actually NJ Turnpike and Parkway that uses Whelen Delta Bars with Halogen Rotators on top not MX7000's. NJ DOT uses Liberty Bars.theroofable said:The NJDOT and parkway crews uses mx7000 amber lightbars, along with other halogen, led, and strobe lights on their vehicles, and they are crazy bright in direct sunlight. Im not sure if its because of the dome color, or if they use different bulbs, but the rotators are extremely effective and bright. I am impressed with their setups. Some of our engines have the Excalibur rotators, the clear domes are impressive, the red ones, not as much but still do a great job. As long as the domes are clean, they will look good.