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2/7/23, 2:46 PM Chapter 6H - MUTCD 2009 Edition - FHWA <br />https://mutcd.fhwa.dot.gov/htm/2009r1r2/part6/part6h.htm#table6H01 3/51 <br />Direction of temporary traffic detour <br />Direction of traffic <br />Flagger <br />High-level warning device (Flag tree) <br />Longitudinal channelizing device <br />Luminaire <br />Pavement markings that should be removed for a long-term project <br />Shadow vehicle <br />Sign (shown facing left) <br />Surveyor <br />Temporary barrier <br />Temporary barrier with warning light <br />Traffic or pedestrian signal <br />Truck-mounted attenuator <br />Type 3 barricade <br />Warning light <br />Work space <br />Work vehicle <br />Table 6H-3. Meaning of Letter Codes on Typical <br />Application Diagrams <br />Road Type Distance Between Signs** <br />A B C <br /> Urban (low speed)*100 feet 100 feet 100 feet <br /> Urban (high speed)*350 feet 350 feet 350 feet <br /> Rural 500 feet 500 feet 500 feet <br /> Expressway / Freeway 1,000 feet 1,500 feet 2,640 feet <br />* Speed category to be determined by the highway agency <br />** The column headings A, B, and C are the dimensions shown in Figures 6H-1 through 6H-46. The A dimension is the <br />distance from the transition or point of restriction to the first sign. The B dimension is the distance between the first <br />and second signs. The C dimension is the distance between the second and third signs. (The "first sign" is the sign in a <br />three-sign series that is closest to the TTC zone. The "third sign" is the sign that is furthest upstream from the TTC <br />zone.) <br />Table 6H-4. Formulas for Determining Taper <br />Length