The legislator denied the charge and was remanded in custody until Tuesday to enable the CID conclude investigations on the matter.
Kahangara was arrested earlier on Friday afternoon after the confrontation with the police officer at the Globe Cinema interchange.
The incident occurred when the legislator reportedly declined to obey traffic regulations and instead engaged the officer in a confrontation.
In August, Bahati MP Kimani Ngunjiri was also arrested and charged for allegedly assaulting a traffic police officer.