As part of the mayor's push to eliminate traffic fatalities, the city announced Thursday it would completely transform four of the busiest thoroughfares in the city. NY1's Courtney Gross filed the following report.

Crossing some streets, you have to hustle. 

Take Queens Boulevard. Between 2009 and 2013, a dozen pedestrians died here, making the roadway one of the most dangerous corridors in the city, according to officials. 

"Particularly for Queens Boulevard, we want to try and envision something more grand, something that makes it a more livable street," said Transportation Commissioner Polly Trottenberg.

The de Blasio administration says it can do that with $250 million, new cash to completely revamp four high-crash roadways in Queens, Brooklyn and the Bronx. 

One of those roads is the Grand Concourse. Twelve pedestrians died here between 2009 and 2013. On Fourth Avenue in Brooklyn, six people died. And in a nod to the mayor's plan to revamp East New York with affordable housing, Atlantic Avenue will also get a makeover. 

"Chaotic, and designed, really, for an auto era, designed with the movement of automobiles as the primary goal, getting them up to speed, and pedestrian and other uses as an afterthought, and we really want to fix that," Trottenberg said.

"The mayor is starting with the most dangerous streets, and that's smart," said Paul Steely White of Transportation Alternatives. "Starting with streets like Queens Boulevard for major fixes is precisely where they should be focusing their effort now." 

So what will these streets eventually look like? Think bike lanes, countdown clocks and green plazas, projects the administration says will come with a sped-up timeline, hoping to accelerate an increase in safety.

"We're going to try and put out some schedules soon, but we really want to speed up the design process, the planning process, the procurement process, every step of the way and really try and deliver some of these projects faster than the city's normal process," Trottenberg said. "I think we hear a lot of complaints that people wish we could do things faster."

Administration officials did not commit to an exact timeline for these projects, but they did say the community will be engaged throughout the process.