# Pavement Markings--Design and Typical Layout Details(2006)

## Chapter: Appendix N - Lane Reductions

« Previous: Appendix M - Climbing or Passing Lanes
Page 114
Suggested Citation:"Appendix N - Lane Reductions." National Academies of Sciences, Engineering, and Medicine. 2006. Pavement Markings--Design and Typical Layout Details. Washington, DC: The National Academies Press. doi: 10.17226/13947.
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Page 115
Suggested Citation:"Appendix N - Lane Reductions." National Academies of Sciences, Engineering, and Medicine. 2006. Pavement Markings--Design and Typical Layout Details. Washington, DC: The National Academies Press. doi: 10.17226/13947.
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Page 116
Suggested Citation:"Appendix N - Lane Reductions." National Academies of Sciences, Engineering, and Medicine. 2006. Pavement Markings--Design and Typical Layout Details. Washington, DC: The National Academies Press. doi: 10.17226/13947.
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Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

114 ARIZONA The lane line markings should be discontinued one-quarter of the distance between the Lane Ends sign and the point where the transition taper begins. Lane-reduction arrows are not shown. ARKANSAS The lane line markings are discontinued 525 ft from the point where the transition taper begins. (It is not clear if this is a statewide standard or a project-specific dimension.) Lane- reduction arrows are not shown. CALIFORNIA The broken lane line ends at 0.75D from the end of the full- width lane. (D is the advance placement distance in feet for Lane Ends warning signs per the MUTCD.) Three lane-reduction arrows are used with the top of the arrows positioned as follows: at the end of the full-width lane, 200 ft from the end of the full-width lane, and 400 ft from the end of the full-width lane. COLORADO The broken lane line ends at 0.75D from the end of the full- width lane. (D is the distance in feet from the W4-2 sign to the end of the full-width lane.) Lane-reduction arrows are not shown. DELAWARE The broken lane line ends at 0.75D from the end of the full- width lane. (D is the distance in feet from the W4-2 sign to the end of the full-width lane.) Lane-reduction arrows are not shown. FLORIDA The broken lane line ends at 0.75D from the end of the full- width lane. (D is the advance placement distance in feet for a W9-2 warning sign and varies from 325 to 700 ft over a speed range of 30 to 55 mph.) Two lane-reduction arrows, each with a MERGE pave- ment message placed just below the bottom of the arrow, are used with the top of the arrows positioned as follows: just before the end of the full-width lane where a painted taper begins (the actual pavement taper begins 120 to 910 ft fur- ther downstream based on the speed and lateral offset), and at the point where the broken lane line terminates. GEORGIA The broken lane line ends at a specified distance from the end of the full-width lane based on the posted speed limit (350 ft for 55 mph, 275 ft for 45 mph, and 200 ft for 35 mph). Lane- reduction arrows are not shown. IDAHO The broken lane line ends 200 ft from the end of the full- width lane. The use of lane-reduction arrows is optional. If used, three lane-reduction arrows should be used with the top of the arrows positioned as follows: at the end of the full- width lane, 200 ft from the end of the full-width lane, and 400 ft from the end of the full-width lane. INDIANA The broken lane line ends 375 ft from the end of the full- width lane. Lane-reduction arrows are not shown. IOWA The broken lane line ends at a specified distance from the end of the full-width lane based on speed (565 ft for 55 mph, 415 ft for 45 mph, 300 ft for 35 mph, and 190 ft for 25 mph). Lane-reduction arrows are not shown. KENTUCKY The broken lane line ends at 0.75D from the end of the full- width lane. (D is the advance placement distance in feet for warning signs using Condition A in Table 2C-4 of MUTCD.) Three lane-reduction arrows are used with the top of the arrows positioned as follows: at 0.75D from the end of the full-width lane, at D from the end of the full-width lane, and at D + 250 ft from the end of the full-width lane. LOUISIANA The broken lane line ends at 0.75D from the end of the full- width lane. (D is the distance in feet from the W4-2 sign to APPENDIX N Lane Reductions

115 the end of the full-width lane.) Lane-reduction arrows are not shown. MARYLAND The broken lane line ends at a specified distance from the end of the full-width lane based on speed (1,275 ft for 65 mph, 1,165 ft for 60 mph, 1,050 ft for 55 mph, 940 ft for 50 mph, and 825 ft for 45 mph). A 10-in.-wide dotted line (3-ft seg- ments with 9-ft gaps) is provided from the end of the broken lane line to the end of the full-width lane. A lane-reduction arrow is positioned such that the bottom of the arrow is lined up with the beginning of the 10-in.-wide dotted line. Two additional lane-reduction arrows are placed in the lane, one in either direction from the lane-reduction arrow that is lined up with the beginning of the 10-in.-wide dotted line. These additional arrows are placed at a distance (measured from the bottom of one arrow to the bottom of the next arrow) that is based on speed (850 ft for 65 mph, 775 ft for 60 mph, 700 ft for 55 mph, 625 ft for 50 mph, and 550 ft for 45 mph). MASSACHUSETTS The broken lane line ends 565 ft (shown as 170 m) from the end of the full-width lane. Lane-reduction arrows are not shown. MICHIGAN The broken lane line ends at a specified distance from the end of the full-width lane. The distance in feet is calculated using the formula â15(S â 10) + 25,â where S is the higher of the posted or 85th percentile speed. Lane-reduction arrows and MERGE messages may also be used. If used, two lane-reduction arrows and MERGE messages are used with the top of the arrows positioned as follows: at D from the end of the full-width lane and at 2D from the end of the full-width lane. MINNESOTA The broken lane line ends 200 ft from the end of the full- width lane. Lane-reduction arrows are not shown. MISSISSIPPI The broken lane line ends at an unspecified distance from the end of the full-width lane. A 6-in.-wide dotted line (2-ft seg- ments with 12-ft gaps) is provided from the end of the bro- ken lane line to the end of the full-width lane. Two lane- reduction arrows are placed in the lane. One lane-reduction arrow is placed at the halfway point of the 6 in.-wide dotted line and the other is placed 100 ft before the end of the bro- ken lane line. The lane-reduction arrows are the same shape as the lane use arrows used in straight-through lanes and are positioned at a 30Â° angle from the lane line. NEVADA The broken lane line ends at 0.75D from the end of the full- width lane. (D is the advance placement distance in feet for warning signs.) Three lane-reduction arrows are used with the top of the arrows positioned as follows: at the end of the full-width lane, at 0.25D from the end of the full-width lane, and at 0.5D from the end of the full-width lane. NEW YORK The broken lane line ends 100 ft from the end of the full- width lane. Lane-reduction arrows are not shown. NORTH CAROLINA The broken lane line ends at 0.75D from the end of the full- width lane. (D is the advance placement distance in feet for warning signs based on the posted or 85th percentile speed and ranges from 175 ft for 20 mph to 850 ft for 65 mph. The values of D are given on Sheet 3 of 3 of Standard 1205.06 in North Carolinaâs Roadway Standard Drawings.) A 4-in. to 6-in.-wide dotted line (2-ft segments with 13-ft gaps) is placed from the end of the broken lane line to the downstream end of the lane reduction taper. Five lane-reduction arrows are used with the top of the arrows positioned as follows: at the end of the full-width lane, at 100 ft from the end of the full-width lane, at 200 ft from the end of the full-width lane, at 500 ft from the end of the full-width lane, and at 800 ft from the end of the full- width lane. NORTH DAKOTA The broken lane line ends at 0.75D from the end of the full- width lane. (D is the advance placement distance in feet for warning signs.) Lane-reduction arrows are not shown. OREGON The broken lane line ends at 0.75D from the end of the full- width lane. (D is the advance placement distance in feet for warning signs and varies from 175 to 850 ft over a posted or 85th percentile speed range of 20 to 65 mph as shown in a table.)

Lane-reduction arrows are optional for speeds greater than 45 mph and are generally not used for speeds of 45 mph or less. If used, a minimum of two lane-reduction arrows must be used with the top of the arrow nearest to the end of the lane typically placed 500 ft from the end of the full-width lane. 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. PENNSYLVANIA The broken lane line ends at D from the end of the full-width lane. (D is the advance placement distance in feet for warn- ing signs using Condition A in Table 2C-4 of MUTCD.) Three lane-reduction arrows are used with the center of the arrow nearest to the end of the lane placed D from the end of the full-width lane. At least two additional lane-reduction arrows are placed upstream of the arrow nearest to the end of the lane. The distance from the center of one arrow to the center of the next arrow is 300 ft on conventional roadways and 600 ft on expressways and freeways. TENNESSEE The broken lane line ends at 0.75D from the end of the full- width lane. (D is the distance in feet from the W4-2 sign to the end of the full-width lane.) Lane-reduction arrows are not shown. UTAH The broken lane line ends at 0.75D from the end of the full- width lane. (D is the distance in feet from the W4-2 sign to the end of the full-width lane.) Lane-reduction arrows are not shown. VERMONT The broken lane line ends 550 ft from the end of the full- width lane. Lane-reduction arrows are not shown. WYOMING The broken lane line ends at 0.5D from the end of the full- width lane. (D is the distance in feet from the W4-2 sign to the end of the full-width lane.) Lane-reduction arrows are not shown. PUERTO RICO The broken lane line ends at 0.75D from the end of the full- width lane. (D is the distance in feet from the W4-2 sign to 116 the end of the full-width lane.) Lane-reduction arrows are not shown. CHARLOTTE, NC The broken lane line ends at the end of the full-width lane. Four lane-reduction arrows are used with the top of the arrows positioned as follows: 25 ft downstream from the end of the full-width lane, at the end of the full-width lane, at 50 ft upstream from the end of the full-width lane, and at 100 ft upstream from the end of the full-width lane. LOS ANGELES, CA The broken lane line ends at the end of the full-width lane. Three lane-reduction arrows are used with the arrows posi- tioned as follows: at the end of the full-width lane, at 200 ft upstream from the end of the full-width lane, and at 400 ft upstream from the end of the full-width lane. TUCSON/PIMA COUNTY, AZ The broken lane line ends at a specified distance from the end of the full-width lane based on the posted speed limit. The distance is shown in a chart and ranges from 245 ft at 30 mph to 475 ft at 50 mph. Three lane-reduction arrows are used with the arrow far- thest upstream positioned with its top a distance D from the end of the full-width lane. The distance D in feet is calcu- lated using the formula â15(S â 25) + 250,â where S is the posted speed in mph. Two additional lane-reduction arrows are placed downstream from this arrow at 40-ft intervals for speed limits of 30 mph or less, 80-ft intervals for 35 or 40 mph speed limits, and 120-ft intervals for speed limits of 45 mph or more. No standards were found for: Alabama Alaska Connecticut Hawaii Illinois Kansas Maine Missouri Montana Nebraska New Hampshire New Jersey New Mexico Ohio Oklahoma Rhode Island South Carolina South Dakota Texas Virginia Washington West Virginia Wisconsin District of Columbia New York, NY

Next: Appendix O - Channelizing Islands, Painted Medians, Paved Shoulders, and Approaches to Obstructions »
Pavement Markings--Design and Typical Layout Details Get This Book
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TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 356: Pavement Markings—Design and Typical Layout Details identifies variations in pavement marking designs, practices, and policies, as provided by 48 of 50 state departments of transportation, and transportation agencies from the District of Columbia, Puerto Rico and four cities.

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