There are a number of different free and paid for sites on the web that allow you to keep track of current traffic problems that might affect you motorway journey in the uk. Two of the best are Realtime Traffic Info and Traffic England both from the Highways Agency. I have recently discovered Traffic Map which seems to be even better. It looks like an improved version of the “Realtime Traffic Info” page without the speed issues that this page can sometimes display. Not only does it display current speed and the text on the large matrix signs it is also able to display the speed matrix signs for the variable speed limit section of the M25 near Heathrow. Very useful.