Practice question

What is the standard required thickness for extruded thermoplastic longitudinal traffic lines on state highways per Caltrans specifications?

  1. Minimum thickness of 0.090 inches (90 mils).
  2. Minimum thickness of 0.030 inches (30 mils).
  3. Minimum thickness of 0.250 inches (250 mils).
  4. Minimum thickness of 0.500 inches (500 mils).

Answer: A — Minimum thickness of 0.090 inches (90 mils).

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