Pavement Marking Lines pt.1
Posted by Jesse Willoughby on Sun, May 31, 2009 @ 05:30 AM
Edgelines
Pavement edgeline markings give drivers a guide to the
edge of the pavement and also enhance safety. A study
of rural highways in Kansas showed that edgelines will
yield benefits exceeding their costs if an average of one
non-intersection crash occurs annually every 15.5 miles
of roadway. Edgelines are a particularly valuable visual
reference during bad weather and poor visibility, especially
along curves. They can also be used to mark the
pavement edge to reduce driving on paved or unpaved
shoulders. Break edgelines for intersections, major
driveways or interchanges. Continue edgelines through
minor driveways unless a full width turn lane has been
provided. Wide solid edgeline markings may be used
for greater emphasis.
Required (shall)
• Rural arterials 20' or more in width and 6000 vehicles
per day or more.
• Freeways and expressways.
Recommended (should)
• Rural arterials and collectors 20' or more in width
and 3000 vehicles per day or more.
Optional (may)
• Other paved streets based on engineering study.
Channelizing lines
Channelizing lines can be used to form channelizing
islands where traffic is going in the same direction on
either side of the island. They shall be a wide or double
wide solid white line. White diagonals or chevron marking
can be placed between the channelizing lines for
greater emphasis.
Yield lines
Yield lines are white and shall
consist of a row of solid white
isosceles triangles pointing
toward approaching traffic.
They are not required, but
may be helpful at roundabouts,
mid-block crosswalks, or other
locations with yield signs.
Stop lines
Stop lines are solid white lines and should be 12"-24"
wide. Stop lines emphasize the stop condition and
indicate where to stop. They are not required, but are
helpful in many situations. For example, visibility may
be better at a point closer to the intersection than the
stop sign can be placed. The stop line can be used to
show this to drivers. Stop lines should be a minimum of
4' in advance of a marked crosswalk. Do not use stop
lines with yield signs. Place no closer than 4' from the
nearest edge of the intersecting travel way and no more
than 30'.