PSI Kanaiyalal Shinde, however, decided not to lodge a police complaint after he was admonished by a senior.
The scriptwriter of Goregaon, meanwhile, claimed he reacted after Shinde abused a woman friend and damaged his car by banging on it.
A DCP (traffic) will probe the allegations.
A large crowd had gathered near the Inorbit Mall traffic signal where the drive was under way.
Shinde, attached to the Malad traffic division, said he was cracking down on illegal parking around the mall when a white Fiat sped through the barricade.
Noticing that the car had tinted glasses and an Uttar Pradesh registration (UP 44 P 9516), traffic constable Rajendra Galve gestured the driver to halt.
When the driver did not heed and crossed the signal, Shinde intercepted the car with Gavle. As he knocked on its glass, the scriptwriter at the steering wheel allegedly got out.
“He began abusing us. When we asked him to stop, he climbed on the car and began shouting and jumping, shattering a side window. He was threatening us. A woman accompanying him too abused us,” said Shinde.
The PSI claimed when he demanded licence, the scriptwriter allegedly threatened him and caught him by his collar.
“He assaulted me. When Galve intervened, he was also beaten up. When the matter went out of hand I demanded the driver come to the police station. He told me he would see to it that I suffer,” alleged Shinde.
By the time Shinde brought the scriptwriter to Bangur Nagar Police Station with the crowd in toe, media persons had arrived.
The duty officer at the police station was heard telling Shinde he should have let the car pass and noted down its licence plate number.
Bangur Nagar Police recorded statements of Shinde, the scriptwriter and witnesses. The scriptwriter told police Shinde abused his female friend and damaged his car.
A little later, senior police inspector (traffic) Ravindra Patil arrived at the police station and was seen scolding Shinde.
Patil was heard instructing him to leave without registering complaint.
Shinde, who allegedly suffered nail scratches, cried: “I do not want to continue like this in the profession. If this is how I am treated, I will quit.”
Inspector Ramesh Mede of Bangur Nagar Police Station said, “We are ready to register a case. However, the victim does not want to lodge a complaint. We have recorded statements of the driver and witnesses.”
Brijesh Singh, additional commissioner of police (traffic), said he had asked a DCP to conduct an inquiry.
If it is found the police officer was assaulted, a case will be registered, he said.
“Mumbai Police Commissioner has ordered strict action against anyone who assaults police personnel. If the incident has occurred, we will make sure a complaint is lodged and the culprit will be dealt with strictly,” said Singh.