Merging traffic sign mutcd12/5/2023 This new and improved version can now be found across the country (though old variants still exist as well). The solid lines were left in place, but their function (bracketing roads) is more obvious. So in 2001, the Federal Highway Administration’s Office of Transportation Operations pitched an alternative based on the original with a small but critical change.Īpproved in 2003 (with a compliance date set for 2013), the modified W4-2 now features a dashed line to add clarity without introducing any dramatic changes. and Canada found that fewer than 40% of participants could properly understand the sign. A subsequent survey of elderly drivers in the U.S. The surveyors “concluded that the difference between fewer lanes, one lane and narrow lanes ahead was not apparent,” writes Eric G. Indeed, an early 1990s study by the Texas Transportation Institute found that only 61% of surveyed motorists could correctly identify the purpose of the W4-2 sign. The existence of text-only supplements (“LANE ENDS MERGE LEFT”) also suggests a graphic-only approach can be baffling. It is hard to tell, though, whether the lines represent lanes or their borders - if lanes, then it looks like two routes coming closer together (not merging). This design can be mirrored to indicate a merge from either the left or the right. The old version of the sign features two lines running parallel at the bottom with one angling in toward the top. The W4-2, also known as the Lane Reduction Transition Sign, is one of the most ubiquitous road signs in the United States - historically, it has also been on of the most confusing. This “Lane Ends” sign often appears in places where a passing lane is eliminated along a rural highway or an entrance lane merges into the main lanes of a freeway.
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