http://www.livablestreets.com/streetswiki/traffic-signals-public-transport-priority
Dunno if they're using them in your area, but the theory is that if public transportation is more predictable/reliable, then more people will use it.
In California, at least, signal manipulation devices are illegal for private use.
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"You go to the track with the Porsche you have, not the Porsche you wish you had."
'03 E46 M3
'57 356A
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