New Jersey law requires drivers of motor vehicles to be in possession of their driver's license, vehicle registration and proof of insurance while on the road.
In the case of an insurance card, the law allows you to show the proof of insurance in "electronic form", which includes showing an image of the card on a tablet, smart phone or laptop. Unfortunately, the exception only applies to your insurance card, so make sure you have your driver's license and vehicle registration when driving.
So, snap a picture of your insurance card or keep an electronic copy accessible on your smart phone. That picture may save you a trip to court and fines and costs of up to $200 or more!