Having just completed another journey from Wokingham to Llannelli by road, mainly on the M4 I have lost count of the number of road works that are currently on this motorway. Of course all of them have a speed limit most of them 50 MPH but one has a 40MPH limit. Before anybody says that these limits are required to protect the workforce I will say that I am in favour of limits while the workforce is working. However most of the time there is no workers working on these sites. Surely in this day and age with all the electronic gadgetry it would be a simple matter to switch the limits on while their is work in progress and off when there is no work. Any ideas?