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Highways for LIFE

Arrow Iowa Demonstration Project: Accelerated Bridge Construction on US 6 over Keg Creek

Appendix

Table 3. Crash history table.
2001 - 2011 Reportable Crash History Crashes involving US 6 and Keg Creek Bridge Pottawattamie County, Iowa (* 2011 data remains preliminary - downloaded 2/3/2011)
Crashes Injuries
Year County Crashes Fatal Major Minor

Poss/Unk

Property Damage Only Injury Fatal Major Minor Possible Unknown
2001 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2002 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2003 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2004 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2005 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2006 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2007 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2008 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2009 Pottawattamie 1 0 0 0 0 1 0 0 0 0 0 0
2010 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
2011 Pottawattamie 0 0 0 0 0 0 0 0 0 0 0 0
  Totals: 1 0 0 0 0 1 0 0 0 0 0 0
Feature Count Report (Monday, February 20, 2012 8:10:23 AM Central Standard Time) produced using: Iowa's Safety Analysis, Visualization, and Exploration Resource (SAVER)

Results of the user satisfaction survey.

Results of user satisfaction survey question #1.
Rate your level of use of the US 6 Keg Creek bridge before construction?
Answer Options Response Percent Response Count
All the time 35.0% 7
Frequent 20.0% 4
Moderate 10.0% 2
Occasional 25.0% 5
Never 10.0% 2
answered question20
skipped question1

Rate your level of use of the US 6 Keg Creek bridge before construction?

Results of user satisfaction survey question #2.
How would you best describe yourself (check all that apply).
Answer Options Response Percent Response Count
I own a business along US 6 close to Keg Creek bridge. 0.0% 0
I work at a business along US 6 close to Keg Creek bridge. 10.5% 2
I live close to Keg Creek bridge. 21.1% 4
I regularly visit a business along US 6 close to Keg Creek bridge. 0.0% 0
I often travel close to or visit areas near Keg Creek bridge. 5.3% 1
I typically use US 6 to get somewhere else. 42.1% 8
I don't typically drive US 6. 21.1% 4
answered question19
skipped question2

How would you best describe yourself (check all that apply).

Results of user satisfaction survey question #3.
Rate how important you believe each approach is and how well it was carried out on this project.
Importance
Answer Options Important Somewhat Important Somewhat Unimportant Unimportant Response Count
Closing US 6 during construction 12 1 0 0 13
Providing signage for commuters in the area 12 0 0 0 12
Condensing closure to two weeks 11 1 0 0 12
Using stronger materials to extend bridge life and reduce future disruptions for maintenance 10 2 0 0 12
Using prefabricated components to speed construction 10 1 1 0 12
Using multiple methods (message signs, radio, texts, etc.) to advise motorists of construction and alternative routes 11 1 0 0 12
How well
Answer Options Very Good Good Poor Very Poor Response Count
Closing US 6 during construction 7 3 0 1 11
Providing signage for commuters in the area 7 4 0 0 11
Condensing closure to two weeks 9 1 1 0 11
Using stronger materials to extend bridge life and reduce future disruptions for maintenance 9 2 0 0 11
Using prefabricated components to speed construction 10 1 0 0 11
Using multiple methods (message signs, radio, texts, etc.) to advise motorists of construction and alternative routes 8 3 0 0 11
Totals
Comments 3
answered question13
skipped question8
Number Response Date Comments Categories
1 Oct 31, 2011 4:43 PM think it should have been closed during summer instead of harvest
2 Oct 28, 2011 10:53 PM Gravel road for detour was not cared for.
3 Oct 14, 2011 2:12 PM I live in Atlantic, and work in Bellevue NE. I drive Highway 6 EVERYDAY.
Results of user satisfaction survey question #4.
Knowing it would mean traffic delays and driving through construction areas, how important was it to close US 6 during construction?
Answer Options Response Percent Response Count
Important 83.3% 10
Somewhat important 16.7% 2
Somewhat unimportant 0.0% 0
Unimportant 0.0% 0
answered question12
skipped question9

Knowing it would mean traffic delays and driving through construction areas, how important was it to close US 6 during construction?

Results of user satisfaction survey question #5.
How satisfied are you with the way the Iowa DOT kept you informed about the construction work?
Answer Options Response Percent Response Count
Satisfied 63.6% 7
Somewhat satisfied 36.4% 4
Somewhat dissatisfied 0.0% 0
Dissatisfied 0.0% 0
answered question11
skipped question10

How satisfied are you with the way the Iowa DOT kept you informed about the construction work?

Results of user satisfaction survey question #6.
What means of communication do you USE MOST OFTEN to learn about traffic issues/roads information?
Answer Options Response Percent Response Count
Radio 33.3% 4
Web sites 41.7% 5
Text messages 8.3% 1
E-Alerts 16.7% 2
Changeable message signs 66.7% 8
Other (please specify) 2
answered question 12
skipped question 9
Number Response Date Other (please specify) Categories
1 Oct 28, 2011 10:54 PM Television
2 Oct 14, 2011 2:15 PM I found the story on the bridge at WOWT.COM today, October 14th. I knew the bridge was being built to the side, but was not able to determine how it would be moved over. This is awesome.

What means of communication do you USE MOST OFTEN to learn about traffic issues/roads information?

Results of user satisfaction survey question #7.
What are the BEST METHODS to keep you informed regarding traffic issues/road construction?
Answer Options Response Percent Response Count
Radio 53.8% 7
Web sites 30.% 4
Text messages 7.7% 1
E-Alerts 23.1% 3
Changeable message signs 61.5% 8
Other (please specify) 2
answered question 13
skipped question 8
Number Response Date Other (please specify) Categories
1 Oct 28, 2011 10:54 PM Television
2 Oct 14, 2011 2:15 PM Using the mobile trailers (signs) you could put them up a little sooner with information on how to get more information, like this website with the details on when the closure is, and the detour information etc. Maybe even sign up for emails and/or text message updates on the schedule, etc.

What are the BEST METHODS to keep you informed regarding traffic issues/road construction?

Results of user satisfaction survey question #8.
Rate the following aspects of the new US 6 Keg Creek bridge and surrounding areas as compared to its previous condition.
Answer Options Much Better Better Unchanged Worse Much Worse Response Count
Lane width 7 2 0 0 0 9
Visibility 3 4 2 0 0 9
Signage 2 4 2 0 0 8
Lighting 0 2 5 0 0 7
Aesthetics (appearance) 3 3 2 0 0 8
Other (please specify) 3
answered question 9
skipped question 12
Number Response Date Other (please specify) Categories
1 10/31/11 did survey before drove on new bridge
2 10/30/11 haven't seen the new bridge yet, still closed
3 10/14/11 Will there be lights on the bridge when it is complete?

Rate the following aspects of the new US 6 Keg Creek bridge and surrounding areas as compared to its previous condition.

Results of user satisfaction survey question #9.
Rate the level of inconvenience you experienced as a user of the US 6 Keg Creek bridge.
Answer Options Response Percent Response Count
Minimal 33.3% 4
Moderate 58.3% 7
Serious 8.3% 1
answered question 12
skipped question 9

Rate the level of inconvenience you experienced as a user of the US 6 Keg Creek bridge.

Results of user satisfaction survey question #10.
Did construction on the US 6 Keg Creek bridge deter you from visiting businesses along US 6?
Answer Options Response Percent Response Count
Yes 8.3% 1
No 91.7% 11
If yes, please specify. 1
answered question 12
skipped question 9
Number Response Date If yes, please specify. Categories
1 Nov 2, 2011 5:19 AM businesses on that end of CB [Council Bluffs]...Fareway, Kmart, etc

Did construction on the US 6 Keg Creek bridge deter you from visiting businesses along US 6?

Results of user satisfaction survey question #11.
Were there any safety issues/concerns raised during the US 6 Keg Creek bridge project?
Answer Options Response Percent Response Count
Yes 30.8% 4
No 69.2% 9
If yes, were they dealt with appropriately? How could they be handled better in the future? 3
answered question 13
skipped question 8
Number Response Date If yes, were they dealt with appropriately? How could they be handled better in the future? Categories
1 Oct 31, 2011 4:47 PM seen five accidents between treynor and metro crossings lights in two weeks, thk extra traffic might have contibuted
2 Oct 28, 2011 10:55 PM Traffic..especially semi trucks not following the signs.
3 Oct 14, 2011 2:18 PM I felt that when the construction required the use of the traffic signals to reduce the lanes down to one lane, that the signs on the EAST side of the bridge should have been much farther back than they were because they were at the top of fhe blind hill, and large vehicles like semi's that need a lot more stopping distance would have been at a disadvantage with such short notice, especially if traffic was backed up at all.

Were there any safety issues/concerns raised during the US 6 Keg Creek bridge project?

Results of user satisfaction survey question #12.
Rate the importance in regard to designing and scheduling projects.
Answer Options Very important Important Unimportant Very unimportant Response Count
Keeping a road/bridge open - allow restricted traffic, increase cost and time 3 2 5 0 10
Closing a road/bridge - no traffic, reduce cost and time 5 4 1 0 10
Extending the life of the road/bridge - more initial cost but less life cycle cost 5 5 0 0 10
Reducing future maintenance needs - more initial cost but fewer disruptions 6 4 0 0 10
Reduce time to complete a project through the use of incentives to contractors 7 1 2 0 10
Reduce time to complete a project through design/material selection 7 3 0 0 10
Creation of alternative routes while project is underway 5 5 0 0 10
Use of multiple methods (technology) to inform the public of work zone conditions 6 4 0 0 10
Other (please specify) 2
answered question 10
skipped question 11
Number Response Date Other (please specify)
1 Nov 2, 2011 11:31 PM It has been lots of fun watching the bridge be built on the side of the road and while I hated taking hwy 92 at least it was only for a short time. I do wish some care had been taken to fix the terrible rough joints on highway 92 before switching so much extra traffic to it. Thanks for getting hwy 6 back open so fast!!
2 Oct 14, 2011 2:19 PM With the close proximity of US Highway 92, this is a perferct solution to replace this bridge. I hope to see it used if other highway 6 bridges are getting replaced since Highway 92 parrallels highway 6.

Rate the importance in regard to designing and scheduling projects.


Iowa DOT Keg Creek Bridge Replacement Showcase Agenda

More Information

Events

Contact

Mary Huie
Highways for LIFE
202-366-3039
mary.huie@dot.gov

Updated: 12/21/2012

FHWA
United States Department of Transportation - Federal Highway Administration