In the Minneapolis area lots of lights now have LEDs for the
red light and orange LEDs for the "Don't Walk" light.

I have seen only two intersections with all three colors in LEDs.

One town has white LEDs for the "walk" sign in addition to the
red "Stop" and orange "Don't Walk" signs.  I suspect that the REDs are
much cheaper than the other colors, and thus, are used more.  I also
suspect that the highway departments are currently evaluating the
maintenance costs saved by the LEDs and trying to determine if they are
worth what they cost.

Dan


On Wed, 28 Jul 1999 07:53:15 -0000, Eric Smith wrote:

>> FWIW, I was passed by a trucker last night with apparent LED tail lights on
>> his trailer.  It had multiple LEDs it appeared.
>
>I should hope so!  They've made great strides in producing "super-bright"
>red LEDs, but I don't think that a single of even the best ones now made
>would be sufficient.
>
>Someone mentioned that they'd only seen LEDs used in red traffic signals,
>but not the other colors.  There's one intersection in Sunnyvale, CA at
>which I've seen LEDs used in the green signal.  I suspect that they are
>doing a trial, as I haven't yet seen them elsewhere.
>