Dublin Bus routes had to be curtailed 108 times last year because of anti-social behaviour.
While services have been taken out of action 92 times so far in 2020.
The figures were provided to Sinn Féin TD Mark Ward following a parliamentary question to the Transport Minister.
They show the number 40 route, running from Charlestown Shopping Centre in Finglas to Liffey Valley Shopping Centre, has been curtailed 35 times this year.
Deputy Ward says the 40 bus "has been forced to curtail its service because of vandals throwing stones and setting off fireworks at buses. This route accounts for over 38% of all bus stoppages this year."
While there were 21 incidents of anti-social behaviour involving the number 27, that operates from Clare Hall to Jobstown.
Deputy Ward went on to say there has been a noticeable lack of Gardaí on patrol at night, which he says needs to be addressed.
Dublin Bus
Dublin Bus says it operates a fleet of 1,000 buses and that given the size and scale of it's operations, the overall level of anti-social behaviour incidents is relatively low.
In a statement, the company says incidents to date this year have decreased by 4.5% compared to the same period last year.
It went on to say the firm is committed to "embracing and fostering community relations and we have implemented physical mechanisms that protect our customers and employees who use our services."
These include CCTV and security screens at the drivers cab.
