I have designed and installed many installations with ASL's and D' loops. = I have always located the loops at standard spacings from the vehicle = stopline and not the advanced stop line. My thinking behind this is that = it is no different to any vehicle stop line. All intergreens etc. are = measured from the vehicle stop lines and vehicle extensions on the loops = are not normally affected. To reinforce this argument on one of our sites with ASL's and D' loops we = have red light cameras installed. The cameras loops are installed and = configured around the vehicle stopline as this is the requirement set out = by our local police authority.. Regards Andy Sawyer - Sefton M.B.C >>> Howard.Saffer@xxxxxxxxxxxxxxxx 19 September 2001 15:38:18 >>> Now there are some users enrolled out there - (and you're all probably fed = up already with replies to Peter Bull from other users joining) - an open = question - to get the ball rolling! Recently we have mainly been installing MVDs with stopline loops on most = of our schemes. On a current scheme we want to install an advanced (cycle) stopline (ASL) = - but need system D loops (in association with speed discrimination). Do (you) other users set out your system 'D' loops 12, 25 and 39 metres = from the vehicle stopline - or from the ASL? What is your rationale for = whatever you do on this? Howard Saffer Traffic Signal Design Sheffield City Council The information in this email is confidential. The contents may not be = disclosed or used by anyone other than the addressee. If you are not the = addressee, please tell us by using the reply facility in your email = software as soon as possible. Sheffield City Council cannot accept any = responsibility for the accuracy or completeness of this message as it has = been transmitted over a public network. If you suspect that the message = may have been intercepted or amended please tell us as soon as possible. ----------------------------------------------------------- A message from the TCUG mailing list. For information about the list visit //www.freelists.org/webpage/tcug or contact peter.bull@xxxxxxxxxxxxxxxx=20 Sefton Metropolitan Borough Council ***************************************************************************= *** Any views expressed by the sender of this message=20 are not necessarily those of Sefton MBC The contents of this e-mail and any attachments may be confidential. It is intended for the named recipients only. If you are not the named=20 recipient please notify the sender and do not disclose the contents to any other party. ***************************************************************************= **** ----------------------------------------------------------- A message from the TCUG mailing list. For information about the list visit //www.freelists.org/webpage/tcug or contact peter.bull@xxxxxxxxxxxxxxxx