By luck in October 2014 the first of 110 New Flyer XT40 trolleybuses, 4300, was seen on test in Uptown. The white car behind is accompanying it.
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The destination display is cycling around and displaying the second screen of "Go Seahawks" as the trolley booms lower austomatically.
Picture ref A5964
 
The booms are lower still as the display cycles to "Test Coach".
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Booms fully lowered.
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The trolley is now ready to roll off wire on battery power
Picture ref A5967