On: Florida shortened yellow lights to increase red li...

[Anechoic]

US DOT should set standards for minimum yellow light times.

They do, through the MUTCD: http://mutcd.fhwa.dot.gov/knowledge/faqs/faq_part4.htm#q32

[sehugg → Anechoic]

I meant actual times, the MUTCD only says you must use "engineering practices" in determining the interval. The ITE equation was included in my link -- however it optimizes for reduced red-light violations, so it's no wonder it's not used in these cases.