buttonhook
n.— «Most of these exits of similar design I have seen come to a stop sign, usually with a turning lane to left, and a stop sign for all at a “T” junction. In anything less than ideal road conditions, it would be extremely easy for any motorist to blow that turn. Having the lanes split off giving traffic heading back west to Bartlett a merge lane is great, but motorists be warned, that “buttonhook” as they call it, is just that, and then some.» —“Speed limit on service road extension ‘ridiculous’” by Mike Williscraft NiagaraThisWeek.com (Thorold, Ontario, Canada) Dec. 31, 2008. (source: Double-Tongued Dictionary)