General info:
ModelCanon PowerShot A570 IS
MakeCanon
Basic shot info:
Focal Length5.8 mm; equivalent: 35 mm
Aperture ValueF4.5
White BalanceAuto white balance
FlashFlash did not fire, auto
Metering ModeCenter weighted average
Shutter Speed Value1/501 sec
ISO Speed Ratings200
Advanced shot info:
Exposure Bias Value0 EV
Exposure Time1/500 sec
Exposure ModeAuto exposure
Max Aperture ValueF2.6
Exif-related info:
Exif Version2.20
Exif Image Width600 pixels
Exif Image Height334 pixels
Color SpacesRGB
CompressionJPEG (old-style)
User Comment
 Portland bicycle facilities » Bicycle boulevards » Speed hump (image 9 of 21)


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Speed hump
Speed humps are one measure that Portland uses to discourage motorists from using bicycle boulevards for through travel, and to slow motor traffic by making higher speeds uncomfortable or even damaging the vehicle. The markings here are not the standard ones in the Manual on Uniform Traffic Control Devices and are less conspicuous. Figure. 3B.29 in the Manual shows larger images of the standard markings.

Speed humps, unlike old-fashioned, narrow speed bumps, do not pose a significant hazard for bicyclists. However, this one and others in Portland have an abrupt transition from the level roadway, causing some discomfort for bicyclists. The preferred design has a profile with a gradual transition from the level roadway to the incline at the start of the speed hump.

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