Paul, I don’t know for sure if pedestrian-crossing chirpers are Americans-with-Disabilities-Act originated, but they seem to be for assisting the ‘vision-deprived’ in street crossing.

For those with way too much extra time, or need reading material during a tedious alien abduction... {HP’s new frou-frou name is Agilent} www.agilent.com/about/newsroom/features/gettoknow/030102electronics.pdf
Studies by the University of Michigan Transportation Institute show that LED center high mount brake lights yield a 170-200 millisecond advantage in braking response time in favorable lighting conditions and a 300 millisecond advantage in poor lighting conditions due to their conspicuous, fast turn-on time.

…and www.agilent.com/about/newsroom/presrel/2004/10may2004c.html
…and www.lumileds.com/pdfs/techpaperspres/intertch2000.PDF

   ...y viernes nuevo habañeros, scott35.




[This message has been edited by Bjarney (edited 12-31-2004).]