Cops are following through on New York Mayor de Blasio’s pledge to stop locking people up for carrying small amounts of pot.

Police cuffed 18,120 stoners through Oct. 20 — a 40 percent plummet from the 29,906 pot busts in the same period last year, state Division of Criminal Justice records show.

At the same time, tickets for pot violations have surged. Cops handed out 13,081 low-level pot summonses through the end of September — and are on pace for more than 16,000 tickets. The NYPD issued 13,378 pot tickets for all of last year, and 13,316 tickets in 2013, records show.

City Hall ordered cops last year to ticket suspects they caught with 25 grams or less of marijuana instead of arresting them after district attorneys and activists clamored for drug decriminalization.

Still, arrests outnumber tickets citywide, and there appears to be wide variations in enforcement. [Read more at the New York Post]