The monitoring also inhibits the tactile cone, don't forget we are talking about blind/partially sighted people - in this respect maybe ped inhibits are a necessary evil? We limit the intergreen extension to 2 seconds but don't tell anyone if this isn't allowed! As for not worrying about vehicle conflicts, I guess peds are generally a little more vulnerable. Regards Dave Haig Senior Engineer - Traffic * tel: 01302 734594 * fax: 01302 735028 * Doncaster Metropolitan Borough Council Neighbourhood Services Scarborough House 25 Chequer Road Doncaster DN1 2DB * dave.haig@xxxxxxxxxxxxxxxx This message is private and confidential, please ensure it is treated as such. If you are not the intended recipient of this message, please notify the sender as soon as possible. -----Original Message----- From: Dave Hulson [mailto:dave.hulson@xxxxxxxxxxxxxxxxxxxxx] Sent: 09 October 2003 15:48 To: TCUG (E-mail) Subject: [TCUG] Red lamp monitoring I have just been reading a recent contribution regarding BV165 which refers to red lamp monitoring and states that it is a "good safety feature". This got me wondering how many people do feel that red lamp monitoring really is a good think and how many people have reservations about it. I have seen the confusion caused to pedestrians when two red lamps were out and a pedestrian phase was inhibited (the pedestrians continued to cross but no longer had any indication of the safest time to cross). I have also seen the effects that an increased intergreen can have at a junction where there had been a single red lamp failure (traffic that was used to following another stream was held for an additional 5 seconds which led to them moving off on red and pedestrians trying to cross when they saw no-one moving). As a consequence I am no longer sure that red lamp monitoring is as useful a safety feature as we are led to believe. I would be interested to hear the views of others on this matter. Finally, if two red lamp failures require us to disable conflicting pedestrian phases, why do we treat conflicting traffic phases as though nothing had happened? Dave Hulson Traffic Signal Design Nottingham City Council ###################################################################### This e-mail (and any attachments) is confidential and may contain personal views which are not the views of Nottingham City Council unless specifically stated. If you have received it in error, please delete it from your system, do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that Nottingham City Council monitors e-mails sent or received. Further communication will signify your consent to this. ###################################################################### ----------------------------------------------------------- A message from the TCUG mailing list. For information about the list visit //www.freelists.org/webpage/tcug ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ********************************************************************** ----------------------------------------------------------- A message from the TCUG mailing list. For information about the list visit //www.freelists.org/webpage/tcug