Drivers may notice "20 mph" and "15 mph" speed limit signs popping up around Brooklyn.

That's because of "Sammy's Law," named after a boy who was killed while crossing the street in Brooklyn in 2013.

The law is implementing 20 mph and in school zones 15 mph speed limits.

Amber Adler is just one of the law's advocates, and is a car crash survivor herself. Adler says the law will save lives.

“I get a life because we were in a zone where he was only going seven mph. Had he been going 25 mph, 30 mph, 35 mph, I can't say that I would have made it," said Adler.

News 12 spoke with people like Baqir Ahmjad, who live along the areas where Sammy's Law is taking effect.

“I have a sense of relief, especially for the students in our schools," said Ahmjad. "I feel safe walking on the streets."

The Department of Transportation tells News 12 the NYPD will spearhead the enforcement. It says by the end of the year, there will be 250 locations with reduced speed limits. It says it is looking into adding more.