The city is set to host the 30th annual National Dominican Day Parade along Sixth Avenue on Sunday.
Dominican community leaders said the event itself has always gone off without a hitch. But after the last two parades, large crowds illegally blocked streets in Washington Heights after revelers moved uptown.
State Senator Adriano Espaillat was among the elected officials from the district who came together to tell the community to keep things positive at the afterparty.
"We're asking participants to cooperate with police officers that will be patrolling Northern Manhattan following the parade," Espaillat said.
NYPD Commanding Officer Jose Navarro of the 34th Precinct added that additional officers will be deployed to the area Sunday.
Espaillat said drinking in public will not be tolerated. He also said businesses that sell alcohol should be extra vigilant about checking for IDs, and might want to consider closing early on Sunday night.
The parade begins Sunday at 11 a.m at 35th Street and Avenue of the Americas and continues to 56th Street.