How do I check traffic where the Belfast Westlink joins the motorway at York Street?

Use the Westlink – York Street traffic-camera entry on TrafficWatchNI.

It covers the northern end of the A12, where drivers connect towards the M2 road network. For a journey continuing east on the M3, checking the Lagan Bridge or Dee Street cameras may be useful as well. One image cannot show an entire route, so examine conditions at both the junction you are entering and the next strategic connection before choosing your approach.