Malfunctioning Traffic Signals

Basically all "demand-actuated" traffic signals.

This example is about a year old, but is typical:

The whole quote is in an article here :
http://www.fredericksburg.com/News/FLS/2007/072007/07162007/298724
(would be nice if more news organizations had a transportation reporter)

"Dear Kelly: I ride a motorcycle and have frequent problems with traffic lights not working correctly. One example is the intersection of State Route 205 and U.S. 301 in King George ....

The Virginia Department of Transportation sent a traffic signal unit to inspect the signal at State Route 205/U.S. 301. ...

The signal unit found the sensor to be working properly, [VDOT] said. ... Contact Tina Bundy at 540/899-4560 ..." [to tell them otherwise]
—Kelly Hannon's on-line column Getting There in the Fredericksburg, VA The Free Lance-Star

Unfortunately a typical response from a DOT — "We checked it and it works ..."

NO, it DOESN'T work!

If a bicycle or motorcycle doesn't trigger it, then it doesn't work.

That is the definition of it working (both a bicycle and a motorcycle should trigger it), as a rule if something doesn't meet the definition of it working then it is considered to not work, duh‽

Further typical DOT responses along lines of "Well we don't have anything to check it with, why don't you bring your (bicycle, motorcycle, scooter, fill in the blank)".

Maybe if you need to test it to work with a bicycle or motorcycle, you should have a typical bike available for testing instead of using your DOT TEN TON TRUCK!