As Minister for Transport, I have no role in the provision of directional data from private providers such as Google, TomTom etc. These devices use traffic flow data from mobile devices located within the vehicles.
There are also no specific regulations around algorithms used by satnav software, which tend to be proprietary materials to a company and furthermore satnav apps such as Google Maps are not necessarily aware of the vehicle type and hence may not identify the vehicle is permitted on particular routes.
However, the use of Cooperative Intelligent Transport Systems (C-ITS), such as the one being pilot tested by TII, presents an alternative way to communicate road restrictions and information electronically in real time to road users. This project is in its early stages and TII would be best placed to provide you with further information on this project.
The Government is committed to reducing road deaths and creating safer roads for everyone in Ireland.
Noting the above position, I have referred your question to TII for a direct reply. Please advise my private office if you do not receive a reply within 10 working days.