On Nov 23, 2006, at 12:28, Joseph Tainter wrote: > But the owner complained that the car does not trigger the > heat-sensitive sensors at intersections, so she gets frustrated > waiting > for the light to change. I suggested she get out and exhale on the > sensor. >
Most intersections use an induction loop - which really is just looking for a big hunk of ferrous metal up above it to trigger left- turn signals and the likes. This can make it a problem sometimes for smaller motorcycles that do not have much ferrous mass (although you can improve your odds by aiming for a spot right above a part of the loop). I have never ever heard of "heat sensors" to detect vehicles at intersections. I'm not stating that they categorically don't exist! Just that I have never heard of such a thing. Anyone? -Charles -- Charles Robinson [EMAIL PROTECTED] Minneapolis, MN http://charles.robinsontwins.org -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
