How far is too far to walk to a traffic signal or beacon?

I was considering the question I fielded at the Livable Streets Talk last night and came across this excerpt from the NCHRP 562 report that is worth citing in the future.


Distance to Nearest Traffic Signal. The current(pre-2006) MUTCD includes a provision that a signal shall not be considered at locations within 300 ft (91 m) of another signal. This is believed to be based on the distance a pedestrian will walk in order to cross the major street. The researchers did not identify data that support this distance or other distances of how far beyond the desired path a pedestrian would be willing to walk. The USDOT’s 1995 Nationwide Personal Transportation Survey did find that most pedestrian trips (73 percent) are 0.5 mi (0.8 km) or less.With most trips being about 2,600 ft (792 m), pedestrians might not be willing to increase their trip length by more than 10 percent in order to walk to a different crossing location. As part of the on-street pedestrian surveys documented in Appendix K, those interviewed were asked “if this crossing was not here, would you walk to the next intersection (point to intersection of interest)?”For three of the sites, only about 25 percent of the respondents would walk to a signalized intersection at 550, 950, or 1,000 ft (168, 290, or 305 m). For the site with a signalized intersection about 200 ft (61 m) from the crossing, about 50 percent of those interviewed would walk to that crossing. The remaining site where this question was appropriate did not follow similar findings. A much higher percentage indicated that they would be willing to walk to another crossing. Over 65 percent of the respondents indicated that they would walk 600 ft (183 m) to cross at a signalized crossing. The number of individuals willing to walk such a distance was influenced by the number of lanes at the site (six lanes), speed and volume of traffic (high), and existing treatment (marked crosswalk only). Several of the respondents selected “yes” to the question and then commented that they walk to the nearby crossing “most of the time” or “sometimes” depending on the weather or other factors.
A future research effort should consider the same question for people on bicycles. Presumably, the speed of a cyclists expands the distance somewhat, but behavior seems largely sensitive to perceived risk.

Cycletrack and Blue Marking for Conflict & Transition Zones in Cambridge

Cambridge, MA was one of the earliest adopters of cycletracks in the U.S. and this was my first time cycling on the facility which is adjacent to the MIT campus. The cycletrack was enjoyable to ride on and reminded me of many of the Dutch cycletracks I had used last summer or the one way facilities common in Copenhagen.  The nature of having the cycling facility flush with the driveway (which is lower speed traffic) is a nice touch. The markings at the driveway denote the potential for a conflict or a transition at the locations where the cycletrack is ending.
The City was using the blue markings prior to the feedback the City of Portland got related to using green and apparently they haven't had the need to go back and refresh the markings.  
The treatment that was worth noting was the yield to bikes sign and the lane configuration sign which included the blue bike lane to indicate to motorists that the lane exists and there should be an awareness of the potential for a conflict. The first time I saw the sign, I had a hard time noting the bike marking in the lane, the black and blue does not provide a very good contrast that is easy to pick up and doesn't offer a consistent marking for the bike symbol, I tend to prefer the addition of the rider to match the striping, but that's a detail that's something to talk with the Manual of Uniform Traffic Control Devices (MUTCD) National Committee about this week.    
This post reminded me of the early work done by Alta to summarize some of the facilities in 2009, which seemed like an eternity ago what with the Green Lane Project and so much emphasis on cycletracks and protected facilities in the past several years.