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[edit] Other terminology
Shouldn't the "Other terminology" include some mention of a "doghouse" traffic signal? It is used at intersections where motorists sometimes can make a left turn without having to wait for oncoming traffic, in which case a lighted green arrow appears. At other times, a green ball (or dot) appears, and drivers attempting a left turn must yield to oncoming traffic. The left green and yellow arrow are placed next to the green and yellow ball, respectively, while a red ball is centered at the top, giving a doghouse-like appearance to the assembly. 66.234.220.195 (talk) 15:31, 23 January 2008 (UTC)