The city plans to reduce speed limits on dozens of streets starting this fall following the passage of “Sammy’s Law,” officials said Thursday.

The law, named for a 12-year-old boy who was struck and killed by a speeding driver in Brooklyn in 2013, allows the city to adjust speed limits to 20 mph on individual streets and 10 mph on select streets that are being redesigned for safety.

The city plans to start reducing speed limits this September, with 250 locations set to see reductions by the end of 2025, the Department of Transportation said in a news release.

“Speed limit reductions will target select schools, Open Streets, Shared Streets, and other areas, as well as new ‘Regional Slow Zones’ in each borough,” the release said, adding that one zone with a speed limit of 20 mph will be created in each borough.

The first zone under consideration is lower Manhattan south of Canal Street, with implementation possible by the end of this year or early next year, according to the release.

The DOT said it will also set a 10 mph speed limit “on all existing and future Shared Streets and on Open Streets that have had substantial design upgrades.”

“Shared Streets” are “roadways with distinctive designs that naturally slow vehicle travel speeds, where pedestrians, cyclists and motorists all share the right of way,” the release noted.

A full list of initial proposed locations for reduced speeds is below:

The Bronx  

• E 139 Street, from Willis Avenue to Alexander Avenue   
• Courtlandt Ave, E 156 St to E 157 St  
• E 151 St, Courtlandt Ave to Morris Ave  
• E 156 St, Concourse Village W to Morris Ave  
• Gerard Ave, E 167 St to E 168 St  
• St Ann’s Ave, E 149 St to Westchester Ave  
• Tinton Ave, E 150 St to E 152 St  
• Sheridan Ave, E 171 St to E 172 St  
• Walton Ave, E 179 St to E 171 St  
• Prospect Ave, E 175 St to E Tremont Ave  
• Wallace Ave, Mace Ave to Waring Ave  
• E 225 St, White Plains Rd to Barnes Ave
• E 172 St, St Lawrence Ave to Beach Ave  
• Netherland Ave, Kappock St to W 227 St   
• Reeds Mill Ln, Bivona St to Steenwich Ave  

 Brooklyn  

• Seventh Ave, 43 St to 44 St   
• Dean St, Saratoga Ave to Thomas Boyland St  
• MacDonough St, Lewis Ave, Marcus Garvey Blvd  
• Christopher Ave, Sutter Ave to Belmont Ave  
• Ashford St, Belmont Ave to Pitkin Ave  
• Prospect Park West, Grand Army Plaza to Bartel Pritchard Square  
• E 94 St, E New York Ave to Rutland Rd  
• Fenimore St, Brooklyn Ave to Rutland Rd  
• Ninth Ave, 63 St to 64 St  
• 45 St, Fort Hamilton Pkway to Tenth Ave  
• Lenox Rd, E 39 St to E 40 St  
• E 96 St, Ave D to Foster Ave  
• Sackman St, Belmont Ave to Sutter Ave  
• Fort Greene Pl, Fulton St to Dekalb Ave  
• Lewis Ave, Hart St to Willoughby Ave  

 Manhattan  

• W 138 St, Amsterdam Ave to Broadway  
• W 64 Street, West End Avenue and Amsterdam Avenue  
• E 120 St, Lexington Ave to Third Ave  
• E 128 St, Lexington Ave to Third Ave  
• Morningside Ave, W 126 St to W 127 St  
• Audubon Avenue, West 165th Street to Fort George Avenue  
• E 112 St, Second Ave to Third Ave   
• E 120 St, Second Ave to Third Ave   
• E 120 St, Madison Ave to Park Ave   
• E 128 St, Madison Ave to Park Ave   

Queens  

• 112 St, 37 Ave to 34 Ave   
• 47 Ave, 108 St to 111 St   
• 155 St, 108 Ave to 109 Ave  
• 167 St, 108 Rd to 109 Ave   
• Union Hall St ,109 Ave to 110 Ave   
• 144 St, 88 Ave to 88 Rd   
• 143 St, Linden Blvd to 115 Ave   
• 105 St, 35 Ave to 37 Ave  
• 31 Ave, 60 St to 61 St  

The DOT has also released a list of initial proposed 10 mph “Shared Streets”:

The Bronx  

• Jennings St, Bronx from Prospect Ave to Bristow St (to be redesigned later this summer)   

Brooklyn  

• Willoughby Ave, from Washington Park to Washington Ave  
• Berry St, from Broadway to N12th St  
• Underhill Ave, from Pacific St to Eastern Parkway  
• Sharon St, from Olive St to Morgan Ave  

Manhattan  

• Broadway from 18 St to 23 St  
• Broadway from 24 St to 25 St  
• Broadway from 27 St to 33 St  
• Broadway from 38 St to 39 St  
• Broadway from 48 St to 50 St  

Queens  

• 34th Avenue from 69 St to 77 St  
• 34th Avenue from 78 St to 93 St  
• 34th Avenue from 94 St to Junction Blvd   

The DOT said it will begin to notify community boards about proposed locations this summer. A 60-day public comment period will follow before new speed limits are implemented.

“Sammy’s Law,” which Gov. Kathy Hochul signed in May, does not apply to “roads with three or more motor vehicle travel lanes in the same direction outside of Manhattan,” the release said.

"Speeding ruins lives, and reducing vehicle speeds by even a few miles per hour could be the difference between life or death in a traffic crash,” DOT Commissioner Ydanis Rodriguez said in a statement. “The new Regional Slow Zones and other speed limit reductions announced today will save lives and keep people safe.”