NEW PLATES for 2014
As of March 2013, the MVC made plans to split up the OMNIBUS category into multiple different classifications.
These plates were first released on July 1, 2014, and all were seen on the roads by November 15, 2014.
Original info from Paul Rosenberg.
 
Originally, the plan was for these 7 new omnibus (passenger transport) types listed below to join OMNIBUS and LIMOUSINE:
OTTaxicab
OJJitney
OAAmbulance
OHHotel Bus
O2Omnibus 2
OSSpecial Para Transit
OMMobile Assistance Vehicle
The pictures below were the original depictions from NJ MVC in 2013.

Taxicab

Jitney

Ambulance

Hotel Bus

Omnibus 2

Special Para Transit

Mobile Assistance Vehicle

When these plates were issued, the "Special Para Transit" (OS) plates became "Paratransit" (OP) plates,
and the "Mobile Assistance Vehicle" caption changed to "Mobility Assistance Vehicle"

The pictures below are the current sample images on the MVC web site.

Taxicab

Jitney

Ambulance

Hotel Bus

Omnibus 2

Paratransit

Mobility Assistance Vehicle

The graphics below were generated by me.

Taxicab
First spotted 07/01/2014

Jitney
First spotted 07/01/2014

Ambulance
First spotted 07/07/2014

Hotel Bus
First spotted 11/15/2014

Omnibus 2
First spotted 08/12/2014

Paratransit
First spotted 07/07/2014

Mobility Assistance Vehicle
First spotted 07/01/2014