If the engineers do walk off the job, the agency plans to increase bus service, saying it would add “very limited” capacity to existing New York commuter bus routes in close proximity to rail stations and will contract with private carriers to operate bus service from key regional park-and-ride locations during weekday peak periods.

Some 350,000 commuters could soon be scrambling for other ways to reach their destinations if New Jersey Transit engineers walk off the job early Friday

The union that represents the engineers who drive New Jersey Transit’s commuter trains has threatened a walkout as soon as Friday if a contract deal is not reached.