Eighteen trucking companies are the subject of police investigation due to alleged mass safety breaches on the highway north of Auckland late last year, RNZ reports. However, three Auckland operators said that cowboy firms had been getting away with it around the city’s highways and roads for years. Transport Agency Waka Kotahi is looking further into 18 companies, based between the central North Island and Northland, caught with multiple faults. The companies’ names were not disclosed, but NZTA said it would name them and revoke their operating licences if they fail to comply.