![]() ![]() The Washington secretary of transportation adopted the MUTCD, so those rules become our rules. Instead, the rules for white lines are found in the Manual on Uniform Traffic Control Devices (MUTCD), a national standard that engineers refer to when designing roads. You won’t find it in the Revised Code of Washington, and it’s only referenced indirectly in the Washington Administrative Code. Where do you find the law specifying the rules about the types of white lines? That’s actually a little tricky. I noticed that in some sections on I-405 there are double-double white lines (a pair of white lines about two feet away from another pair of white lines), suggesting that DOT must be really serious about not changing lanes. ![]() The closest example I can think of is between Lynnwood and Bellevue on the I-405 toll lanes. Even if a carpool or toll lane has limited hours where it is in effect, the double solid lines still mean “do not cross” all the time. Sometimes carpool or toll lanes are separated by double white lines. You’ll find double white lines at gore areas where they start wide and come to a point. ![]() Solid double white lines may be close together or may be separated by eighteen or more inches of space. Solid Double: Similar to double yellow lines that indicate it is illegal to pass, double white lines indicate that it is illegal to change lanes. You’ll find solid lines leading up to intersections, at the end of gore areas* and separating general use lanes from carpool lanes. Lane changes in these areas present a greater risk than usual the Washington driver guide recommends that you stay in your lane unless a special situation requires a change. Notice that it’s not prohibited just discouraged. Solid: Besides being used to mark the edge of the roadway where the shoulder begins, solid white lines are used in areas where lane changes are discouraged. Exit-only lanes are marked with dashed lines, as are transition areas when a lane switches from general use to carpool. They can be broken, dashed, solid or solid double and each type has a reason and some rules.īroken: These are the lines you see separating two or more lanes going in the same direction in areas where it is reasonably safe to change lanes.ĭashed: Similar to broken lines, but with shorter segments, dashed lines are used to indicate that a lane will be ending or changing use. White lines are used to separate lanes traveling in the same direction or to mark the shoulder of the roadway. Q: What are the rules on crossing white lines? Solid white lines, double white lines, white lines on the shoulder of the road some of you have been wondering about when it’s okay to make lane changes across white lines.Ī: Let’s start with where white lines are found and the types of white lines you might encounter while driving. ![]()
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