He was busy trying to remove from the bypass a lorry that had broken down.
Sitakunda Police Sub Inspector (PSI) Nasir Uddin, 45, had been tasked with some others to remove the vehicle to smoothen traffic, Highway Police Kumira Sub-post Sergeant Zillur Rahim told bdnews24.com.
Rahim said Nasir Uddin died on spot when a speeding covered van rammed into him from behind around 11pm.
Police have seized the covered van and the lorry, but both their drivers have managed to escape.