Can a stop line be used in advance of a midblock crosswalk to show vehicles where to stop for a pedestrian?.Is it mandatory that a stop line be used with all STOP signs and traffic signals?.Does the MUTCD allow the stop line (or yield line) to be "staggered" by lane? That is, can the stop line for the right lane be closer to the intersection than the stop line for the other lanes on an approach?.Are rumble strips considered traffic control devices and, if so, does the MUTCD govern their design, spacing, etc.?.Why do the MUTCD and the AASHTO Green Book have different values for passing sight distance?.What are the minimum passing sight distances for no-passing zone markings in Table 3B-1 in the MUTCD based on? Where did they come from?. Why doesn't the MUTCD provide for a dotted lane line, rather than a normal broken lane line, on the approach to a lane-reduction transition? Isn't this another example of a "non-continuing lane" that would be appropriate for use of a dotted lane line?.Why does the MUTCD recommend a 3:1 ratio for gap length and skip length for a broken lane line? What research is this based on?.Does a solid white lane line prohibit crossing to change lanes?.When black markings are used to provide enhanced contrast for white or yellow pavement markings, what widths and patterns of black markings should be used?.Is such a concept compliant with the MUTCD? I've heard about a crosswalk design that simulates 3-dimensional (3-D) objects in the roadway.Can this type of crosswalk meet the MUTCD requirements? As part of the project, we plan to install brick pavers or other similar treatments to serve as the crosswalks at intersections. We are installing brick sidewalks, benches, trees, and other "streetscaping" features along the business district streets. My city is trying to make the downtown area more aesthetically pleasing and pedestrian-friendly.Can I put any design or collection of art treatments in a crosswalk as long as the transverse white lines are present?.What are the warrants for installing a marked crosswalk at a midblock location?.Does the MUTCD allow intersection murals or widespread application of artwork to the street?.What are the approved uses of purple-colored pavement?.What are the approved uses of green-colored pavement?.What are the approved uses for red-colored pavement?.Given the answer to the previous question, could my agency set up the IIRPMs to be normally "off" and only turn them on (in a steadily-illuminated mode) for a certain number of seconds when a vehicle is detected approaching the curve?.Is it allowable to flash those IIRPMs when approaching vehicles exceed a given speed threshold? My agency is considering using internally-illuminated raised pavement markers (IIRPM) to supplement center line and lane line markings through a particularly severe horizontal curve to help road users navigate the curve.Is it illegal to cross a double yellow centerline on a road when making a left turn into a private driveway?.Why can't a single solid yellow center line be used on a roadway open to public travel?. The following alphabetical list of questions relates to the MUTCD Part 3 - Markings: Knowledge > Frequently Asked Questions Frequently Asked Questions - Part 3 - Markings
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