Mervyn, The AVL is a lot better, at least it's appropriate and I would go along with that. Problem in Sefton is that we only have SVD which is not so flexible. I tend to counter this by keeping its priority quite low at peds. With regards to over heads, yes, we have had problems of cancelled demands and have place PD in those cases pending replacement units. I understand that our normal supplier is replacing a number of units during the next week and we will monitor those. Talking about something that sounds like monitor, I am about to trial 8 'red' units to see how they operate. I'm surprised that this technology still seems to have problems in the 21st century. Peter Peter Jones Project Leader - Traffic Control Systems Phone: +44 (0) 151 934 4254 Fax: +44 (0) 151 922 4514 Mobile: 07788 100 584 Peter.Jones (AT) technical.sefton.gov.uk Sefton MBC - UTC 7th Floor Balliol House Balliol Road Bootle L20 3NJ Please see our web pages on traffic control in Sefton: http://www.sefton.gov.uk/content-2781 ----------------------------------------------------------- A message from the TCUG mailing list. For information about the list visit //www.freelists.org/webpage/tcug