1 / 13

Response Time

Response Time. Transportation: Ch. 1, Act. 1. What do you think?. How fast do you think you would be able to respond to an emergency situation on the road? The average response time for most drivers is about 0.33s. What do you think?. How far can you go in 0.33s? At 30 mph, this is 14 feet.

robertdmiles
Download Presentation

Response Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Response Time Transportation: Ch. 1, Act. 1

  2. What do you think? • How fast do you think you would be able to respond to an emergency situation on the road? • The average response time for most drivers is about 0.33s.

  3. What do you think? • How far can you go in 0.33s? • At 30 mph, this is 14 feet. • At 60 mph, this is __ feet. • This is BEFORE you try to stop the car.

  4. Response Time • What factors affect response time? • Alertness • Drugs & alcohol • Age • Distractions • Conversations (cell phone and others) • Eating & drinking • Putting on make-up • Rubber necking

  5. Highway Statistics – 15-20 • 2004: • 24 percent of fatally injured drivers aged 15-20 were intoxicated (blood alcohol concentration [BAC] greater than 0.08 percent). • 2003: • 6.3 percent of licensed drivers, • 13.6 percent of all highway fatal crashes.

  6. Highway Statistics – 15-20 • 2002: • Crash severity increases with alcohol involvement. • 2 percent of drivers in property-damage-only crashes had been drinking. • 4 percent of young drivers in injury crashes had been drinking. • 23 percent of young drivers in fatal crashes had been drinking. • ~ $40.8 billion = estimated cost of police-reported young driver crashes.

  7. Highway Statistics – 15-20 • Young drivers do only 20 percent of their driving at night, but over half the crash fatalities of adolescent drivers occur during nighttime hours. • The risk of a crash involving a teenage driver increases with each additional teen passenger in the vehicle.

  8. Highway Statistics – 15-20 • Research shows that the cognitive effects of conducting a conversation on a wireless telephone can decrease situational awareness and that wireless telephone use can increase reaction time. • A 2001 study, "Driver Situational Awareness and Carphone Use," reported that drivers engaged in wireless conversations were unaware of traffic movements around them.

  9. Average vs. Instantaneous Speed? • Average Speed: Total distance traveled / total time. • Average speed is independent of the path traveled. It does not necessarily reflect your speed at a given moment in time. • Instantaneous Speed: The speed that you are traveling at at a specific moment in time.

  10. Observing Speed • Speed can be observed and represented in a couple of ways. • Motion Diagrams: A strobe representation through pictures of a moving object taken at a specific time interval. • Graphs: Speed can be determined through graphical analysis where the distance or velocity of an object may be measured vs. time.

  11. Motion Diagrams Constant Speed: Positive Acceleration: Negative Acceleration:

  12. Graphical Anaysis Distance or Velocity Time

More Related