--- Stephen Humphreys <[EMAIL PROTECTED]> wrote: > I genuinely admire your optimism. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of Paul Trusten, R.Ph. > Sent: 20 January 2005 19:47 > To: U.S. Metric Association > Subject: [USMA:32004] red circle speed limit > > > We have established standard red-circle-plus-slash > signs in the U.S. (no > parking, no left turn, no U-turn, etc.). So, as part > of a future > national plan, red-circle signs without the slash > and with the speed > limit in km/h would follow logically, in that they > would have a basis > in now-familiar U.S. signage but would also > distinguish themselves from > pre-metric speed limit sign designs, which do not > use a red circle.
Actually, someone had proposed that the US add a red circle to its standard design for metric highway speed limit signs (even though the US doesn't use metric signage, yet, designs for such signs exists and is maintained). You can what was the proposed sign at: http://mutcd.fhwa.dot.gov/pdfs/millennium/pr2/2br2.pdf on page 2B-8. This would have made the US Metric speed limit sign somewhat similar in appearance to the signs used on most other countries. However, as I recall, the proposal to use a red circle was later changed to use a green circle instead. The rationale was that the US population normally associate the color red with prohibition of an action, while green indicates that an action is permitted. It doesn't make much difference yet, since they are only designs and can't actually be used. Stephen Gallagher
