NJ Transit and an engineers’ union appear to be heading toward a major rail strike that would start Friday — the first one in decades. Currently, both sides are in Washington, D.C. participating in mediation,

The union representing NJ Transit engineers members have authorized a strike for Friday at 12:01 a.m. if no agreement has been reached.

An NJ Transit strike could trigger other transit changes around the region, including worsening traffic due to displaced NJ Transit passengers driving to work. Newark Light Rail will operate extended peak hour service if a strike happens, NJ Transit said. NJ Transit will also add bus service on regular routes.

A possible NJ Transit rail strike doesn’t lie! NJ Transit announced it’s canceling train and bus service to MetLife Stadium for the Shakira concerts on Thursday and Friday due to the possibility of NJ Transit engineers calling a strike by the end of the week.

Shakira fans attending the “Hips Don’t Lie” singer’s upcoming performances at MetLife stadium shouldn’t rely on NJ Transit for transportation.

Fans can also get to the concerts by taking taxis or ride share services like Uber and Lyft. NJ Transit is warning concertgoers of expected surge pricing on ride share apps and anticipating delays of up to two hours for rides requested after the concert.

Beyonce fans might be better off riding a horse to next week’s “Cowboy Carter” concerts at MetLife Stadium if a strike shuts down NJ Transit rail service. NJ Transit’s train engineers could walk off the job as soon as Friday after Brotherhood of Locomotive Engineers members voted to reject a tentative agreement between the leaders of the agency and the union.

The Hoboken firm has landed four recent NJ Transit bus contracts — despite a $20.5 million settlement over allegations it stranded customers.