A tense exchange between an elderly motorist and an anti-vaccination mandate protester.

Anti-vaccination mandate and sovereign citizen protesters have been driving slowly and beeping horns to slow traffic across Canberra.

Police have issued a warning to the public to expect more delays on Canberra roads this week with protest activity likely to increase in coming days.

Anti-vaccination mandate and sovereign citizen protesters are expected to target the Parliamentary Triangle and airport precinct, as federal MPs fly in ahead of the first sitting day on Tuesday.