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From page 73... ... C-1 A P P E N D I X C Suggested Revisions to MUTCD In this appendix, researchers provide an overview of the suggested revisions to the language in the 2009 Manual on Uniform Traffic Control Devices with Revision Numbers 1 and 2, including their reasoning for the changes. This is followed by the detailed suggestions. Read the entire page →
From page 74... ... C-2 by the committee based on judgment. As such, there is no documentation to support the creation of this definition. Read the entire page →
From page 75... ... C-3 • Paragraph 05a, approved by the NCUTCD in June 2014, has been added. This allows the use of red light-emitting diodes (LEDs) Read the entire page →
From page 76... ... C-4 Section 2B.41 -- Wrong-Way Traffic Control at Interchange Ramps • Paragraph 1A requires ONE WAY signs at only one corner of the intersection, but Figure 2B-18 shows all ONE WAY signs as optional. The researchers have no research basis for indicating which ONE WAY signs are the optional signs. Read the entire page →
From page 77... ... C-5 Suggested Changes to MUTCD Proposed additions are shown in blue underline, and proposed deletions are shown in red strikethrough. Changes previously approved by NCUTCD, but not yet adopted by the Federal Highway Administration, are shown in green double underline for additions and green double strikethrough for deletions. Read the entire page →
From page 78... ... C-6 115. Median -- the portion of a highway separating opposing directions of the traveled way area between two roadways of a divided highway measured from edge of traveled way to edge of traveled way. Read the entire page →
From page 79... ... C-7 a. Opposing Paths Cross. Read the entire page →
From page 80... ... C-8 Standard: 09 A narrow Keep Right (R4-7c) sign shall not be installed on a median island that has a width of 4 feet or more at the point where the sign is to be located. Read the entire page →
From page 82... ... C-10 [Add Figure 2B-12a to address DO NOT ENTER signs for single intersection.] Section 2B.38 WRONG WAY Sign (R5-1a) Read the entire page →
From page 83... ... C-11 03a Red LEDs may be installed within the border of the WRONG WAY sign to enhance the conspicuity of the sign. The LEDs may be vehicle actuated to flash at the rates as shown in Section 2A.07(09) Read the entire page →
From page 84... ... C-12 10 At signalized T-intersections where the roadway at the top of the T-intersection is a one-way roadway, ONE WAY signs shall be placed near the appropriate signal faces, on the poles holding the traffic signals, on the mast arm or span wire holding the signals, or at the locations specified for unsignalized intersections. Option: 11 Where the central island of a roundabout allows for the installation of signs, ONE WAY signs may be used instead of or in addition to Roundabout Directional Arrow (R6-4 series) Read the entire page →
From page 86... ... C-14 Section 2B.40a Wrong-Way Traffic Control at Divided Highway Crossings Support: 01 At the crossing of a divided highway with a roadway, the type and location of traffic control devices used to deter wrong-way movements depend upon the classification of the crossing as a single intersection or two intersections (see Section 2A.23) Read the entire page →
From page 87... ... C-15 B A WRONG WAY sign may be used to supplement any DO NOT ENTER signs (see Section 2B.38) Read the entire page →
From page 88... ... C-16 B At least one DO NOT ENTER sign shall be conspicuously placed near the downstream end of the exit ramp in positions appropriate for full view of a road user starting to enter wrongly from the crossroad. Read the entire page →
From page 89... ... C-17 wrong-way movements on freeway or expressway exit ramps, a DO NOT ENTER sign(s) and/or a WRONG WAY sign(s) Read the entire page →
From page 90... ... C-18 PART 3 MARKINGS CHAPTER 3B. PAVEMENT AND CURB MARKINGS Section 3B.20 Pavement Word, Symbol, and Arrow Markings Support: 01 Word, symbol, and arrow markings on the pavement are used for the purpose of guiding, warning, or regulating traffic. Read the entire page →
From page 91... ... C-19 Standard: 03 Word, symbol, and arrow markings shall be white, except as otherwise provided in this Section. 04 Pavement marking letters, numerals, symbols, and arrows shall be installed in accordance with the design details in the Pavement Markings chapter of the "Standard Highway Signs and Markings" book (see Section 1A.11) Read the entire page →
From page 92... ... C-20 Standard: 17 The yield-ahead triangle symbol or YIELD AHEAD word pavement marking shall not be used unless a YIELD sign (see Section 2B.08) is in place at the intersection. Read the entire page →
From page 93... ... C-21 Guidance: 26 Where through lanes approaching an intersection become mandatory turn lanes, ONLY word markings (see Figure 3B-23) should be used in addition to the required lane-use arrow markings and signs (see Sections 2B.19 and 2B.20) Read the entire page →
From page 94... ... C-22 Guidance: 36 Where crossroad channelization or ramp geometrics do not make wrong-way movements difficult, the appropriate lane-use arrow should be placed in each lane of an exit ramp near the crossroad terminal where it will be clearly visible to a potential wrong-way road user (see Figure 2B-18) Read the entire page →
From page 95... ... C-23 Section 4C.01 Studies and Factors for Justifying Traffic Control Signals Standard: 01 An engineering study of traffic conditions, pedestrian characteristics, and physical characteristics of the location shall be performed to determine whether installation of a traffic control signal is justified at a particular location. 02 The investigation of the need for a traffic control signal shall include an analysis of factors related to the existing operation and safety at the study location and the potential to improve these conditions, and the applicable factors contained in the following traffic signal warrants: Warrant 1, Eight-Hour Vehicular Volume Warrant 2, Four-Hour Vehicular Volume Warrant 3, Peak Hour Warrant 4, Pedestrian Volume Warrant 5, School Crossing Warrant 6, Coordinated Signal System Warrant 7, Crash Experience Warrant 8, Roadway Network Warrant 9, Intersection Near a Grade Crossing 03 The satisfaction of a traffic signal warrant or warrants shall not in itself require the installation of a traffic control signal. Read the entire page →
From page 96... ... C-24 the approach turns left and the left-turn lane is of sufficient length to accommodate all left-turn vehicles. 10 Similar engineering judgment and rationale should be applied to a street approach with one through/left-turn lane plus a right-turn lane. Read the entire page →
From page 97... ... C-25 and/or persons with physical or visual disabilities need special consideration, the pedestrians and their crossing times may be classified by general observation. Read the entire page →
From page 101... ... Abbreviations and acronyms used without definitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America's Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) Read the entire page →
From page 102... ... TRA N SPO RTATIO N RESEA RCH BO A RD 500 Fifth Street, N W W ashington, D C 20001 A D D RESS SERV ICE REQ U ESTED N O N -PR O FIT O R G . Read the entire page →

From page 73...

... C-1 A P P E N D I X C Suggested Revisions to MUTCD In this appendix, researchers provide an overview of the suggested revisions to the language in the 2009 Manual on Uniform Traffic Control Devices with Revision Numbers 1 and 2, including their reasoning for the changes. This is followed by the detailed suggestions.