Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of...

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Designing for Older Drivers Fall 2014

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Transcript of Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of...

Page 1: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Designing for Older Drivers

Fall 2014

Page 2: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Many elderly live in poverty, ill health, and inadequate housing

Increasingly, many of those over age 65 will be very old—over age 80–85. In the United States, the number of those over age 85 grew 300% between 1960 and 1996—to 3.8 million people, comprising 1% of the U.S.

By the middle of the next century, 1 in 20 Americans will be over age 85

Women live longer than men (more female drivers)

Recent Trends

Page 3: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

See also:◦ Understanding Older Drivers: An Examination of

Medical Conditions, Medication Use, and Travel Behavior by AAA (2014) (https://www.aaafoundation.org/sites/default/files/Medication%20and%20Travel%20Behaviors%20--%20FINAL%20FTS%20FORMAT%20copy.pdf)

◦ Millennials in Motion: Changing Travel Habits of Young Americans and the Implications for Public Policy (Oct. 2014) (http://www.uspirg.org/sites/pirg/files/reports/Millennials%20in%20Motion%20USPIRG.pdf) (http://www.uspirg.org/reports/usp/millennials-motion)

Recent Trends

https://www.aaafoundation.org/sites/default/files/Medication%20and%20Travel%20Behaviors%20--%20FINAL%20FTS%20FORMAT%20copy.pdf
https://www.aaafoundation.org/sites/default/files/Medication%20and%20Travel%20Behaviors%20--%20FINAL%20FTS%20FORMAT%20copy.pdf
https://www.aaafoundation.org/sites/default/files/Medication%20and%20Travel%20Behaviors%20--%20FINAL%20FTS%20FORMAT%20copy.pdf
https://www.aaafoundation.org/sites/default/files/Medication%20and%20Travel%20Behaviors%20--%20FINAL%20FTS%20FORMAT%20copy.pdf
http://www.uspirg.org/sites/pirg/files/reports/Millennials%20in%20Motion%20USPIRG.pdf
http://www.uspirg.org/sites/pirg/files/reports/Millennials%20in%20Motion%20USPIRG.pdf
http://www.uspirg.org/sites/pirg/files/reports/Millennials%20in%20Motion%20USPIRG.pdf
http://www.uspirg.org/sites/pirg/files/reports/Millennials%20in%20Motion%20USPIRG.pdf
http://www.uspirg.org/reports/usp/millennials-motion
http://www.uspirg.org/reports/usp/millennials-motion
Page 4: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 5: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 6: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 7: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 8: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 9: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 10: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 11: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 12: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 13: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 14: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 15: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Recent Trends

Page 16: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Designing for Older Drivers

Values can be used for computing the sight distance at intersections

Page 17: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Designing for Older Drivers

Page 18: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Designing for Older Drivers

Page 19: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Designing for Older Drivers

Page 20: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Skewed Intersection

● In the design of a new facility (or re-design), all intersecting highways should meet at 90o

● If ROW is restrictive, the skew angle should be no less than 75o

● If skewed angle smaller, a RTOR prohibition is recommended

Page 21: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Receiving Lane Width

● 12-ft lane and 4-ft shoulder (critical task: lane positioning)

Recommended Design: Channelization

● Raised channelization with sloping curbs preferred over pavement markings

● Use retroreflectorized marking maintained at minimum luminance level

● provide acceleration lane for right-turn channelization

Recommended Design: Sight Distance Requirements

● PRT should be above 2.5 seconds for left, right and crossing

● Use a minimum of 8.0 seconds for a left-turn from a stopped maneuver

Page 22: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Left-Turn Geometry & Signing

● Provide positive offset design with unrestricted sight distance

● Use truck design templates whenever there is a high probability of truck traffic

● When positive offset design is not possible, provide adequate signing and pavement marking

Page 23: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection Design

Page 24: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection Design

Page 25: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection Design

Page 26: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection Design

Page 27: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Curb Radius

● 25 ft to 30 ft to minimize pedestrian crossing and moderate the speed of turning vehicles

Recommended Design: Traffic Control for Left-Turn Traffic

● Use separate signal heads

● Use protected-only signals whenever possible (leading rather than lagging)

● Install “LEFT-TURN YIELD ON GREEN” sign

● Green arrow followed by left arrow and then solid red circular red

Page 28: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Street Signs

● 6-in minimum size

● Use overhead-mounted street signs with mixed-case letters

● Use redundant street-name signs (not mandatory)

● If different street names, the names should be separated and accompanied by directional arrows

Page 29: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: One-Way/Wrong-Way

Page 30: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: One-Way/Wrong-Way

Page 31: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Stop Controlled

● Use supplemental sign under stop sign

Page 32: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Pedestrian Crossings

● Use 2.8 ft/s seconds walking speed

Where right-turn lane is channelized

Two-stage crossing (median refuge island)

Page 33: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Intersection DesignRecommended Design: Pedestrian Crossings

Page 34: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Curve Design

Page 35: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Interchange DesignRecommended Design: Exit Signing & Ramp Gore Design

● 1-in letter for every 33 ft distance

● Mixed-case font for overhead signs

Page 36: Fall 2014. Many elderly live in poverty, ill health, and inadequate housing Increasingly, many of those over age 65 will be very old—over age 80–85.

Interchange DesignRecommended Design: Exit Signing & Ramp Gore Design


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