The toll increases come despite TII admitting the M50 is full to capacity, and had its highest number of crashes and incidents last year.
Aontu is calling for tolls on the M50 to be scrapped, following an early-morning protest on motorway bridges across Dublin today.
Party members and councillors hung banners over the M50 in opposition to toll increases introduced on New Year’s Day.
A car using the M50 typically pays around €2.60 with a toll tag.
The toll increases come despite TII admitting the M50 is full to capacity, and had its highest number of crashes and incidents last year.
Geraldine Herbert, Motoring Editor with the Sunday Independent, explains why that's the case.

A New Bill To Recognise Unborn Children As Road Crash Victims Launched
Calls To Abolish The Sub-Minimum Wage Rate For Those Under 20
Commander Alex Quigley Report's High Morale Among Irish Troops In Lebanon
Three People Arrested Over Suspected Murder Of William Delaney Released Without Charge
Council Acquired Seven Derelict Properties Through Compulsory Purchase Orders Last Year
Investigations Continue Into Beauty Brands Sephora And Benefit Over Marketing Issues
Parents Association Call For Urgent Action Over "Unsafe" Maynooth School Car Park
Minister Martin Heydon Calls On EU To Be Flexible On Levies For Fertiliser