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Book recommendation
Oct. 20th, 2007 09:56 pmIf you're interested in how the stuff around you works, you should take a look at A Field Guid to Roadside Technology by Ed Sobey. The first two sections (highways and roadways, bridges) cover things you've probably already noticed, but the other sections have some genuinely neat information on how to recognize various bits of infrastructure and what they actually do.
Random Observation: You know those audio crosswalk signals? They go "chirp, chirp" and "de dunk". It never actually occurred to me that there was one sound for each direction (NS or EW). Because I only noticed them while waiting to cross a street, I just sort of assumed one sound was for go and the other for stop. If I'd ever stopped to think about it, this would have been blatantly obvious.
Random Observation: You know those audio crosswalk signals? They go "chirp, chirp" and "de dunk". It never actually occurred to me that there was one sound for each direction (NS or EW). Because I only noticed them while waiting to cross a street, I just sort of assumed one sound was for go and the other for stop. If I'd ever stopped to think about it, this would have been blatantly obvious.
