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Publication Number: FHWA-HRT-13-048
Date: October 2013

 

Driver Expectations When Navigating Complex Interchanges

Appendix C. Task 4 Complete Responses from Warm-up Activity

Table 18 provides a summary of the responses from the focus group warm-up activity. Note that the counts in the table correspond to the number of groups where a particular answer was provided.

Table 18. Summary of responses from focus group warm-up activity.

Question

Seattle, WA

Columbus, OH

Washington, DC

Total

Questions Related to the Exit

Where is the exit?

On the right

4

4

4

12

On the left

0

0

0

0

Sometimes on the left

1

2

2

5

How many lanes would the exit have?

One lane

3

4

4

11

Two lanes

1

3

1

5

Usually one but sometimes two

0

1

1

2

Depends on exit roadway size

1

0

0

1

Four lanes

0

1

0

1

Could cut off in multiple directions (e.g., North-South, Exit A-B, etc.)

0

0

1

1

What happens to the travel lane after the exit?

 

It exits and also continues (option lane)

3

4

4

11

It ends (lane drop)

1

3

1

5

Depends if it is marked exit only or not

2

1

1

4

Depends on the traffic volume on the freeway or exiting roadway

2

0

0

2

Questions Related to the Interchange in General

Where are the signs placed?

Overhead

2

4

1

7

On the right

2

2

1

5

On the side

0

2

0

2

On the left

1

0

0

1

How far ahead of the exit are the signs?

2 mi

0

0

1

1

1.5 mi

1

0

1

2

1 mi

3

2

2

7

0.75 mi

0

1

1

2

0.50 mi

3

3

2

8

0.25 mi

1

2

1

4

500 ft

0

0

2

2

300 ft

1

0

0

1

At the exit

0

0

2

2

Are there multiple sets of signs?

Yes

1

3

3

7

No

1

0

0

1

What should the signs say?

Destination name

2

3

3

8

Exit number

3

2

3

8

Exit distance

3

2

3

8

Exit only (sometimes)

1

2

1

4

Which lane exits

2

1

0

3

Cardinal direction of the exit roadway

1

1

1

3

Amenities

1

0

1

2

Route number

0

1

1

2

Heading of the road (toward a city or town)

0

1

1

2

Warnings (e.g., reduce speed, sharp curve, etc.)

1

0

1

2

Arrows

0

0

1

1

Information for other upcoming exits

1

0

1

1

Mile number

0

1

0

1

No reentry

0

1

0

1

Speed limit

0

0

1

1

Location of landmarks

0

0

1

1

Do you rely on lane markings?

No

3

1

1

5

Mentioned destination pavement markings

1

3

1

5

Sometimes

1

3

0

4

If it is a solid white line

1

1

1

3

Yes

0

2

0

2

Only in the exit lane

1

0

0

1

If it is a lane drop

1

0

0

1

Markings if they are related to an infraction fee

1

0

0

1

Arrows

0

1

0

1

 

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