Angeal Minott, 20, has been arrested and charged in the July 13 incident, police said.
Safety improvements include concrete neck-downs along Park Avenue between 96th and 111th streets.
West 181st and Amsterdam Avenue has the most collisions of any intersection in Washington Heights.
The street is home to the three most collision-prone intersections in the neighborhood.
Cars will still be allowed on the East Drive during weekday rush hour, the city announced Thursday.
The city hopes to reduce crashes at the busy Prospect-Lefferts Gardens intersection.
The DOT wants to reduce each avenue from four to two lanes of traffic and add bike lanes.
The Bennett Avenue entrance to the 190th Street A train station received new safety measures.
Brooklyn Community Board 8 asked the Department of Transportation to beef up their plan.
The improvements are the first phase of redesign plans for the roadway, nicknamed "Boulevard of Death."
Transportation advocates have pushed for safety upgrades on 21st Street for the last few years.
Raymond Ramos hit the victim early Monday at the corner of Nostrand Ave. and St. Johns Pl., police said.
Councilwoman Karen Koslowitz set aside funds for a study to determine how to make the street safer.
The DOT wants to increase pedestrian and cyclist access to the High Bridge, which will reopen in July.
The event, scheduled for March 7, will begin in Forest Hills.
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