The drive continued for more than 10 hours and heavy police deployment was made to avoid any untoward incident.
The police removed wreckages, rotten dumpers, old water tanks, off road vehicles and other construction material like stone, bricks and sand, SP, Shimla D W Negi said.
He said the police did not challan any encroacher and no FIR was registered but cautioned the people against encroaching upon the roads.
The idea behind the drive was to keep Shimla clean and maintain its natural beauty besides ensuring smooth traffic, he said.