Speed tables on Oxbow Place, Laurel, MD.  The two speed tables are spaced approximately 300 feet apart and have a crosswalk located halfway between.  At this spacing, motorists tend to accelerate slightly after the first table, but generally maintain the desired speed.
<a href="//commons.wikimedia.org/wiki/User:Thisisbossi" title="User:Thisisbossi">Thisisbossi</a>
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<span class="int-own-work" lang="en">Own work</span>