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Human Factors Guidelines for Road Systems - Collection C: Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated) (2010) / Chapter Skim
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Effectiveness of Symbolic Markings
Pages 54-55

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From page 54...
... Additionally, the pavement can be a good location to provide lane-specific information. Design Guidelines Marking Do this: Do not do this: Goal Reduce speeds in horizontal curves Curve arrow and "Curve 55 mph" text Transverse lines "Curve Ahead" text "50 mph" text Reduce wrong-way movements N/A on two-way frontage roads Lane direction arrows on a two-way frontage road by an off-ramp Provide route guidance Route shield in the exiting lane Route name text in the exiting lane information for lane drops N/A Pavement marking arrows (in addition to traditional lane drop markings)
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From page 55...
... With the addition of pavement marking arrows, erratic maneuvers such as lane changes through the gore and attempted lane changes decreased. Drivers continuing on the main route moved out of the exit lane earlier.
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Key Terms

  • lane drop
  • pavement marking
  • lane direction
  • curve arrow
  • frontage road

  • direction arrows
  • pavement markings
  • speed reduction
  • marking arrows
  • transverse lines

  • route name
  • significantly reduced
  • route shield
  • name text
  • lane changes

  • expert judgment
  • exiting lane
  • surveyed drivers
  • sign viewing
  • route guidance

  • drivers exceeding
  • road following
  • significant speed
  • urban roadway
  • suburban road

  • exit lane
  • guidance information
  • respondents preferred
  • word legibility
  • drop exits


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