1. Scoping for Performance-Based Solutions; CR E2 ACEC Conference March 5, Tom O’Keefe Metro District Program Delivery

2. Problem Scenario
The sizes of bridges today are an average six times the size of its predecessor…
Federal Bridge Inventory Report
Innovative solutions to bridge the gap
Transportation Demand
Transportation Funding
In 2010, Twin Cities was ranked 10th most congested city in the nation.
(according to 2011 Urban Mobility Report)
In 2010, Twin Cities was ranked 10th most congested city in the nation...
2011 Urban Mobility Report

3. Age Profile and Investment Strategy of State Highway Bridges
Overview
Based on 2009 MnDOT Bridge Report
10.9% to 19.6% Replace ( =896)
58.4% Improve (2,675)
30.2% Preventive Maintenance (1,383)
Age Profile and Investment Strategy of State Highway Bridges

4. We are competing with the world for our message.

5. We are competing with the world for our message.

6. Superstructure Rating – 4 Substructure Rating – 5
Existing Bridge
Constructed in 1964
Chapter 152 Bridge
Superstructure Rating – 4
Substructure Rating – 5
Vertical Clearance – 14.8’
Sufficiency Rating – 52
Structurally Deficient
All beams over SB 35W have repair patches from several high load hits,
South fascia has some severed tendons

7. Traffic Volumes West Side ADT East Side ADT
2010 – 10, – 10, – 10, – 14, – 9, – 9,600
2010 – – – – – – 7600
We are competing with the world for our message.

8. Existing Delay West Junction East Junction am LOS B (12 seconds delay)
pm LOS C (21 seconds delay)
East Junction
am LOS B (13 seconds delay)
We are competing with the world for our message.

9. Future Delay 10% Growth 20% Growth West Junction East Junction
am LOS B (14 seconds delay)
pm LOS D (34 seconds delay)
East Junction
am LOS C (15 seconds delay)
pm LOS D (33 seconds delay)
West Junction
am LOS C (16 seconds delay)
pm LOS F (69 seconds delay)
East Junction
am LOS C (19 seconds delay)
pm LOS F (64 seconds delay)
We are competing with the world for our message.

10. Crash History West Ramp East Ramp Statewide Rank - #2320
Crash Cost - $51,000
Crash Rate – 0.36
Severity Rate – 0.42
Statewide Rank - #2699
Crash Cost - $8,000
Crash Rate – 0.14
Severity Rate – 0.14
How many intersections are there statewide – Over 8000 intersections statewide
Metro Average crash cost is $109,000
Average CR for metro area is 0.4 for all way stop
Average SR for metro area is 0.5 for all way stop

11. Existing E2 Bridge Section

12. Proposed E2 Bridge Section
We are competing with the world for our message.

13. Section Under E2 Bridge 30’ Clear Zone

14. Section Under E2 Bridge 16’ Clear Zone

15. Tradeoffs for I35W Section
Bridge cost increase for 30’ clear zone
Bridge Maintenance Cost incr. for 30’ clear zone
Guardrail 16’
Annualized Guardrail Repair 16’
Annualized Guardrail Snow & Ice 16’
Operating funds vs. Construction funds