The National Transport and Safety Authority (NTSA) has now taken over the enforcement of a directive prohibiting the use of unauthorized emergency lights and sirens.
The agency which made a return to the roads a week ago conducted a major operation at the weekend along major highways.
Several vehicles fitted with unauthorized modified sirens, light bars and strobe lights were nabbed during the operation.
In February, Deputy Inspector General of Police Douglas Kanja wrote to all Regional police and Formation commanders directing them to ensure the order is enforced.
"You are directed to take legal action as stipulated in our laws and regulations against any person not authorized to use the following on our roads and highways: strobe lights, light bars, sirens lead/chase cars," reads the notice dated February 16," the notice said.
"Deal accordingly," it further states.
The response, Kanja said, was a result of complaints reported to his office by motorists who alleged harassment by unauthorized persons using the emergency response equipment.
NTSA now wants all motor vehicle owners to comply with the directive.
"To avoid any inconveniences, all motor vehicle owners are advised to remove modified or unauthorized lights on their vehicles," a notice reads.
Transport Cabinet Secretary Kipchumba Murkomen announced on March 19 the move to have the authority enforce traffic safety on the roads.
"You will be seeing a return of the NTSA working with traffic police to enforce traffic safety on our roads as soon as possible," Murkomen said.
"We are going to establish a mechanism where the previous directive to remove NTSA from enforcement will be vacated."