Followup to the discussion at our meeting this morning (6/13)
about bike sensitive traffic signal sensors.  I found relevant
guidelines at:
            http://www.vtpi.org/nmt_guide.doc
All traffic signals should be adjusted to detect bicycles. 
Quadrapole loop detectors are more sensitive to bicycles and
may be more effective than standard loop detectors.  The
most sensitive area of the detector should be stenciled with
a bicycle symbol.  The right-most thru lane and left turning 
lane should be stenciled in this way.  The clearance interval 
for intersections should be at a bicycle speed of 10mi/hr with
2.5 second braking time 	AASHTO, 13

Also, the 1998 FHWA report "Implementing Bicycle Improvements
at the Local Level" < http://www.bikefed.org/PDF/chapt9.pdf > 
contains diagrams for diagonal quadripole loop placement in
pavement and specifications for the painted marking indicating
maximum bicycle sensitivity ("stop here designation").  See
page 6 of 8 in the pdf reader. The following page has
clearance interval formulas for bicycles.

It would be great if bike-sensitive loops became the design
standard for new and replacement installations.  This would be
a minimal cost increase when a loop is being installed anyhow. 
For existing standard single loops, it would also be great to
have them calibrated for the best bike sensitivity possible
while keeping wrong-lane detection  acceptably low, and then
marking that "stop here" sweet spot for cyclists.  I have
fairly well determined and memorized the sweet spots at a
couple of the intersections along my most frequent routes, 
but it's guess-and-wait or giveup-and-run the non-functional
sensors at other locations around town.  I recognize that most
of the sensors we have now are the responsibility of UDOT, not
Logan, but I expect that we will see an increase in locally-
maintained traffic signal sensors in the near future.

Here's an interesting UDOT budget item related to bike-safe
drain grates:
http://www.dot.state.ut.us/cns/bidprices/AvgUnitPrices2000.txt
Notice in about the middle of the page:
(Standard Grating),     Std Dwg 1703  $410.00
(Bicycle Safe Grating), Std Dwg 1703  $312.63
Bicycle safe grating is cheaper than standard grating.