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Traffic Safety Essentials: Signs, Signals, and Speed Limits

Discover the key aspects of traffic safety with a focus on signs, signals, and speed limits. Learn about three categories of traffic signs, railroad crossing warnings, traffic signals, roadway markings, pavement markings, and common expressway signs and signals. Understand the basic speed rule and maximum speed limits in Oregon for various locations including alleys, business districts, residential areas, highways, and interstates.

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Traffic Safety Essentials: Signs, Signals, and Speed Limits

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  1. Western Oregon University Oregon Department of Transportation Transportation Safety Division DriverRisk Prevention Curriculum Signs, Signals, Markings & Speed Limits

  2. Three Categories of Traffic Signs Regulate traffic, movement or parking Warn of potential dangers or road conditions Provide Guidance and information

  3. Colors Have Meaning Red Green Blue Yellow Black White Orange Brown Fluorescent Optic Yellow

  4. Traffic Signs • Regulatory • Red, white and black • Warning • Yellow, Orange • Guide • Blue+red, blue, brown, white+black, green

  5. Railroad Crossing Warnings RR sign or RR painted on the pavement are advanced warning signs. Crossbucks are regulatory signs. Drivers must yield! Flashing red lights Bells Gates If you hear or see a train

  6. Traffic SignalsHorizontal & Vertical • Red - driver must stop • Steady yellow warns a red will follow • Flashing yellow - caution • Green – Proceed with caution • Pedestrian signals • Lane use signals • Railroad crossing gate

  7. Roadway Markings • Designate lanes • Warn of hazards • Signal permission to pass • Provide other information

  8. Left turn only lane Pavement Markings Multi-lane Two lane rural ONE Way TWO Way Stop lines Cross Walks

  9. WHITE LINES

  10. YELLOW LINES • ALWAYS KEEP TO THE RIGHT OF A YELLOW LINE

  11. Pavement Markings

  12. Common Expressway Signs • Interstate sign • Guide signs • Warning sign • Construction sign • Regulatory • Speed limit

  13. Green Yellow Red X X Common Expressway Signals • Lane use signals • Green arrow • Yellow “X” • Red “X” • Ramp metering • Signal light • Road sensors STOP GO

  14. Expressway Lane Markings • Solid yellow line • Solid white line • Broken white line • HOV lane

  15. REVERSIBLE LANES - AM

  16. REVERSIBLE LANES - PM

  17. Basic Speed Rule • “Drive at a speed that is reasonable and prudent at all times,” regardless of the posted speed or maximum limit. (ORS 811.100) • To obey the basic rule, the following must be considered: • Speed in relation to other traffic • Surface and width of the road • Hazards at intersections • Weather • Visibility

  18. Maximum Speed Limits in Oregon • Alleys: 15 mph • Business Districts and School Zones: 20 mph • Residential Districts & Public Parks: 25 mph • Highways: 55 mph • Urban interstates: 60 mph • Rural interstate highways: 70 unless other wise posted mph

  19. OR OR 30 MPH or less Adjacent to school grounds OR 35 MPH or greater Adjacent to school grounds Crosswalk Non-adjacent to school grounds

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