The M50 has come in for some criticism this week, with revenue from the tolls having nearly doubled since 2015.  This is while motorists are faced with mass delays and congestion during peak hours. So what exactly is the problem, and what are the solutions to it?  

For more on this Claire spoke to Professor in Transportation at Trinity College Dublin, Brian Caulfield. 

Trinity College are conducting this survey https://eu.surveymonkey.com/r/D6TSRX7.