Two young men were arrested after a video of them reportedly pretending to give a bribe to a life-size cardboard cutout of a traffic police officer was published online, the BBC reported.
Later the men were released on bail, while the situation has reportedly sparked major outrage between local citizens and social media users.
"The Sri Lankan police are considered one of the country's most corrupt institutions", an anti-corruption NGO Transparency International told the BBC.
According to the news reports, drivers often bribe traffic officers to get out of paying penalties and to bypass bureaucracy.
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In December, two officers were reportedly suspended after a video showing them taking bribes near the president's office had appeared online.