Pavement Markings--Design and Typical Layout Details (2006) / Chapter Skim
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Pages 25-35
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From page 25... ...
The design standards for Rhode Island recommend the use of high-visibility crosswalks at midblock locations. Use and Placement of Stop Lines or Yield Lines at Midblock Crosswalks (6 agencies)
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From page 26... ...
Figure 3B-7 shows an example of the pavement markings that are used for 2WLTLs. The lane lines on both sides of the 2WLTL are shown as a solid yellow line adjacent to the through lane and a broken yellow line adjacent to the 2WLTL.
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From page 27... ...
." Lane Lines (37 agencies) All of the design standards consistently show the lane lines on both sides of the 2WLTL as a solid yellow line adjacent to the through lane and a broken yellow line adjacent to the 2WLTL.
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From page 28... ...
The design standards for seven agencies specify the desired or required spacing between sets of arrows as the distance between the center points of the sets. The desired or required distances specified for these six agencies are as follows: WV -- typically 200 to 500 ft MS -- 250 ft NC, PA -- typically 320 ft OR -- placed at even intervals, proportioned within each block, with the approximate interval in feet being ten times the posted speed limit in mph IA -- the interval in feet is typically ten times the speed limit in mph, or one set of arrows located midblock KS -- the interval in feet is ten times the speed limit in mph.
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From page 29... ...
For the last 650 ft of the full-width climbing lane, no lane line is used. (The treatments of climbing lanes through portions of roadways where entrance or exit ramps enter or exit the roadway are also shown, as is the treatment of a climbing lane that is on an entrance ramp.)
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From page 30... ...
The design standards for New York show a partial barrier line (a 4-in.-wide solid line on the left-hand side and a 4-in.wide broken line with 10-ft segments and 30-ft gaps on the right-hand side) connecting the centerline at the upstream end of the shifting taper with the upstream end of the broken lane line to encourage drivers to move into the right lane at the beginning of the passing lane area.
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From page 31... ...
Dotted Lane Line in Transition Area (1 agency) The design standards for North Carolina show a 4- to 6-in.wide dotted line (2-ft segments with 13-ft gaps)
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From page 32... ...
The other nine agencies that use lane-reduction arrows in the lane that is ending place the top of the arrows at the following distances upstream from the upstream end of the transition taper: CA, ID, LAN -- 0 ft, 200 ft, and 400 ft NC -- 0 ft, 100 ft, 200 ft, 500 ft, and 800 ft NV -- 0, 0.25D, and 0.5D KY -- 0.75D, D, and D + 250 ft MI -- D and 2D FL -- just before the downstream end of the full-width lane where a painted taper begins (the edge of pavement taper begins 120 to 910 ft farther downstream based on the speed and lateral offset, and at the downstream end of the broken lane line OR -- typically 500 ft to the first arrow and then additional lane-reduction arrows are placed upstream with the spacing between the bottom of the downstream arrow and the top of the upstream arrow being 200 ft. PAINTED MEDIANS, PAVED SHOULDERS, AND APPROACHES TO OBSTRUCTIONS Figure 9 shows examples of diagonal lines in painted medians and on paved shoulders.
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From page 33... ...
The design standards for the 34 agencies that specify a line width for the diagonal lines (at a forward angle of 45° unless otherwise stated) within painted medians use the following widths: MI -- 6 in.
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From page 34... ...
for the diagonal lines within painted medians use the following spacings: DC -- 5 ft SC -- 6 ft for the first five diagonal lines, 12 ft for the next four diagonal lines, and 18 ft for the remaining diagonal lines (the diagonal lines start when the median width reaches 2 ft and end when the median width reaches 8 ft; however, the length of median with diagonal lines spaced at 18-ft intervals is not less than 72 ft or more than 500 ft) VT -- 7 ft where speeds are low, sight distance is less than 200 ft, and the length of the painted median is 75 ft or less; 14 ft where speeds are high, sight distance is 200 ft or more, and where the length of the painted median is more than 75 ft PA -- 8 ft for posted speed limits of 35 mph or less and 16 ft for posted speed limits of more than 35 mph RI, UT -- 10 ft FL, MI -- 10 to 40 ft based on posted speed limit NY -- 11 ft (shown as 3.3 m)
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From page 35... ...
for the diagonal lines (at a forward angle of 45° unless otherwise stated) on paved shoulders use the following spacings: DC -- 5 ft FL, MI -- 10 to 40 ft based on posted speed limit OH -- 12 ft for the first 48 ft, 24 ft for the next 48 ft, and 48 ft thereafter GA -- 15 to 50 ft MS, NH -- 20 ft CO -- 20 to 100 ft CLT -- 30 ft PR -- 33 ft HI -- 40 ft TN -- 50 ft for posted speed limits of 40 mph or less and 100 ft for posted speed limits of more than 40 mph IL -- 50 ft for speed limits less than 30 mph, 75 ft for speed limits from 30 to 45 mph, and 150 ft for speed limits of more than 45 mph (if the recommended spacing does not provide at least five diagonal lines in the area being marked, the spacing from the next lowest speed range should be used)
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