They filled the steps at City Hall on Tuesday, reading the names of people whom cars and trucks killed on New York City streets this year.

Relatives of crash victims joined advocates and lawmakers to demand the Bill de Blasio administration do more to make streets safer.

"We need to treat this like the epidemic and public health crisis that it is," said Debbie Kahn, a member of advocacy group Families for Safe Streets. "We need action now."

The NYPD says 64 people have died in traffic crashes so far this year, compared to 50 over the same period last year — an increase of nearly 30 percent despite the de Blasio administration spending hundreds of millions of dollars on redesigning streets, creating bike lanes, and stepping up enforcement under its Vision Zero program to eradicate traffic deaths.

One of the most recent victims is three-year-old Emur Shavkator, who was fatally struck by a candy delivery van in Brooklyn on Thursday.

"That a 3-year-old child with a scooter up against a driver in a multi-ton vehicle in an intersection that the city knew for years was highly dangerous and problematic," said City Councilman Mark Treyger, who represents the district where Emur was killed.

The advocates say they want Vision Zero to be more comprehensive, rather than what they call a piecemeal approach targeting individual problem spots. A bill before the City Council would require the city to consider a checklist of safety measures in every major street project.

"Every street should be designed for safety before someone dies, not after one, two, three, four, five people die in that location," said Amy Cohen of Families for Safe Streets.

Responding in a statement, a spokesperson for the city transportation department said, "This administration has brought traffic fatalities to historic lows for five consecutive years with record numbers of ambitious street redesigns across all five boroughs. And we are not resting on our laurels."

The City Council plans to vote on the Vision Zero design standards by the end of the month. The de Blasio administration has opposed the legislation, claiming it would be too costly and potentially delay street safety projects.