What are all of these "mb" signs popping up across parts of new jersey?

DENVILLE, N.J. — Temporary signs marked with cryptic abbreviations like “MB” are drawing attention across multiple towns in New Jersey, with many residents asking what they mean. According to film enthusiasts and insiders on social media, the signs are linked to ongoing film and television production.

Some speculate that it means “main base” while others said the abbreviation is short for “Mama’s Boy”, the working title of a new movie being filmed in parts of New Jersey from the Friday the 13th series.

The signs, often placed near intersections or along roadsides, are typically used to guide cast and crew to various filming locations. “Those are usually pointing to a filming location. MB is probably the initials of the film or TV show,” one user commented in a popular thread on Reddit’s r/newjersey forum. “It’s to direct cast and crew.”

Others familiar with the industry noted that “MB” could also stand for “Main Base” or “Base Camp,” indicating the primary staging area for vehicles, equipment, and trailers during production.

Similar signs labeled with terms like “SET,” “BASE CAMP,” or “SERVICES” have been spotted in towns including Denville and Mountain Lakes in recent months, where local filming has increased.

“This is the answer. It’s usually an abbreviation for the project/project’s code name,” another user added, pointing to a common practice in both television and movie production.

Film and TV shoots in New Jersey have been on the rise following expanded state tax incentives designed to attract more projects to the area. Temporary signage is part of standard logistics to help crews navigate between multiple locations.

Locals say they’ve noticed a growing number of these directional signs, but exact project names remain undisclosed due to non-disclosure agreements typically enforced on sets.

We’re not sure what it means to be honest. If you can confirm, please let us know in the comments.

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