Highway patrol officers issued 70 summonses and took five vehicles off the road at a commercial vehicle checkpoint in Yaphank on Friday, Suffolk police said.
Among the 26 commercial vehicles, five were given safety inspections and all failed, police said.
Of the 70 summonses, 58 were for weight and safety violations and 12 for violations of state environmental conservation laws, police said.
The vehicles were stopped between 8 a.m. and 1 p.m. at the truck inspection site on the Long Island Expressway near Exit 66, which is County Road 101.
The goal was to crack down on unsafe and overweight trucks to protect motorists and limit damage to roads, said highway police, who were assisted by officers from the Sixth Precinct and state Department of Environmental Conservation.
Of the 26 vehicles weighed, seven violated weight limits. Those violations could result in fines totaling $110,000, police said.