Shocking new photos show a succession of subway cars slathered top to bottom with graffiti.

The multi-colored compositions across a cavalcade of cars at Jamaica Yard in Queens — posted on Twitter by transit worker group Progressive Action — featured messages like “Don’t come here!” and “Drugs all day!”

Eleven cars were hit, according to the MTA, which said workers found the vandalized cars at the Queens yard early Friday.

For workers, it represented more than just an eyesore — but also a sign of how unsafe the system has become.

“The truth is if graffiti artists have the time to do all this work, then there’s more than enough time to sabotage the system or equipment in other ways,” Progressive Action tweeted.

“This @MTA @NYCTSubway system isn’t safe.”

Transit riders were also appalled — saying it reminds them of the dark days of the 1970s and 80s.

“Seeing these trains in this condition is for me like a bad flashback,” said Frank Pugliesi, 52, of Middle Village.

“Young people have no idea what the city was like in the 70s and 80s when I was growing up and every subway car looked just like these … Riding the subways back then, you were taking your life in your hands.”

Mo Ilyayev, 39, of Forest Hills, added: “How is it that the world’s most sophisticated transit system can be broken into by anyone with some rope and a good pair of shoes? If you can sneak in all that spray paint — and that’s a lot of spray paint — you can just as easily sneak in a bomb.”

Graffiti has made a resurgence on the city’s subways in recent years. The earlier half of the decade saw just around 200 incidents, while there were 619 in 2018, The Post reported in December. “Major” graffiti incidents have also tripled compared to five years ago, according to MTA stats.

Most major graffiti incidents happen overnight at train yards, according to the MTA.

Related Video Video length 46 seconds :46 Video shows MTA subway train fully covered in graffiti Video shows MTA subway train fully covered in graffiti

“We have zero tolerance for these incidents, which take passenger trains out of service and take away valuable resources and thousands of dollars from critical system improvements,” MTA chief safety officer Patrick Warren said in a statement.