Presentation for the April 2018 CTR Symposium by Kris Pruner http://ctr.utexas.edu/ctr-symp/

1. COLLABORATE. INNOVATE. EDUCATE.
Managing Mobility during Design-
Build Highway Construction –
Successes and Lessons Learned
Duane Milligan, P.E. – TxDOT
Kristopher Pruner – CTR

2. COLLABORATE. INNOVATE. EDUCATE.
Design-Build Method
• Schematic-level Design
• Two-Step Procurement
• Selected Design-Build Contractor responsible
for final design as well as construction
– Some construction begins while design in other
areas is ongoing
– Contractor develops Traffic Control Plans

3. COLLABORATE. INNOVATE. EDUCATE.
Dallas Horseshoe Project
Margaret
McDermott
Bridge
• Upgrade Roadway Geometry
• Replace IH 30 and IH 35E
Bridges across Trinity River
• Construct Additional Lanes
• Construct Margaret
McDermott Bridge

4. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Mobility Challenges
• High Volume Interstate Highways
– 460,000 average weekday traffic through project
area
• Constraints involving Houston Viaduct
• Proximity to Downtown Dallas

5. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Successes
• Traffic Control Plan designed in a way that
generally maintained existing access or
provided reasonable alternates
• Contractor structured work to maximize the
usefulness of each closure
• No overnight closures lingered into the
morning peak period

6. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Work during One Night
• Work Completed during one night of full WB IH
30 and full NB IH 35E closure:
– Set 7 Tx62 girders over westbound IH 30 on Bridge 45
– Set 8 Tx62 girders over northbound IH 35E on Bridge
10
– Placed temporary shoring and work platform for
Houston Street arches, decking, and railing
– Removed bridge overhangs for completed Jefferson
Street railing
– Removed existing high mast illumination pole
– Placed 1000 lf of portable concrete barrier

7. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Work during One Night

8. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Work during One Night

9. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Work during One Night

10. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Work during One Night

11. COLLABORATE. INNOVATE. EDUCATE.
Horseshoe – Work during One Night

12. COLLABORATE. INNOVATE. EDUCATE.
Lessons Learned
• Collaboration
– Work with the contractor to find reasonable
solutions to difficult situations
• Tracking
– Ongoing and persistent monitoring of lane
closures

13. COLLABORATE. INNOVATE. EDUCATE.
Tools to Protect Mobility
• Stated Minimum Number of Lanes to be
Maintained
• Designated Allowable Closures
• Liquidated Damages/Lane Rental Fees
– Including an exemption amount (“Bank Balance”)
• Collaborative relationship between TxDOT and
the design-build contractor

14. COLLABORATE. INNOVATE. EDUCATE.
Minimum Number of Lanes
• Origin-Destination Table defines minimum number of lanes
to be maintained during peak periods
• Developed based on consideration of detours, planning,
comparison of existing and proposed conditions
# Origin Via Destination Minimum Number of Lanes to be
maintained
1 NB IH
35E
NB
IH
35E
NB IH 35E 2 Through Lanes
2 Colorado 1 Lane Exit or Detour
3 Riverfront 1 Lane Exit (2 Lanes for at least 200’
upstream of intersection)
4 Jefferson via HOV 0 (with interim HOV lane end and transition
to main lanes near Louisiana)
5 Reunion 1 Lane Exit
6 EB
IH
30
EB IH 30 2 Through Lanes either to EB IH 30 or EB IH
30 CD (or 1 lane to each) (If 2 Through
Lanes only to EB IH 30, provide slip ramp
east of Hotel Street to EB IH 30 CD)7 EB
IH
30
CD
EB IH 30 CD
8 Lamar/Griffin/Downtown Maintain Routes or Detour

15. COLLABORATE. INNOVATE. EDUCATE.
Allowable Closures Table
• Provides durations for which closures/detours
may be in place
• Paired with a table specifying liquidated
damages for exceeding allowable durations
# Origin Via Destination Description Allowable
Closure
Duration
(Consecutive
Calendar
Days)
2 NB IH 35E NB IH 35E Colorado NB IH 35E access to
Colorado east of IH
35E
90 Days
8 NB IH 35E EB IH 30
CD
Lamar/Griffin/Downtown NB IH 35E access to
downtown through
the EB IH 30 CD
90 Days

16. COLLABORATE. INNOVATE. EDUCATE.
Liquidated Damages and Lane
Rental Fees
• Liquidated Damages assessed
for Time Period A closures
• First $1,400,000 in Lane
Rental Fees exempted (Time
Periods B, C, and D)
Northbound IH
35E (South of
Mixmaster)
Time Period A
Liquidated
Damages Per
Hour
Time Period B
Lane Rental
Fees Per Hour
Time Period C
Lane Rental
Fees Per Hour
Time Period
D Lane Rental
Fees Per Hour
One Lane Closed $10,000 $2,000 $100 $50
Two Lanes Closed $20,000 $5,000 $500 $100
Three Lanes
Closed
$50,000 $20,000 $2,000 $500
Four Lanes
Closed (Full Main
Lane Closure)
$100,000 $50,000 $5,000 $2,000
HourDay Sun Mon-
Thu
Fri Sat
… … … … …
4:00 D D D D
5:00 D C C D
6:00 D A A C
7:00 C A A B
8:00 C A A B
9:00 C A A B
10:00 B B B B
11:00 B B B B
12:00 B B B B
13:00 B B B B
14:00 B B B B
… … … … …

17. COLLABORATE. INNOVATE. EDUCATE.
Collaborative Relationship
• TxDOT and contractor met frequently during
design process
• Difficult areas reviewed jointly to develop
solutions
• Closures scheduled and discussed in advance
• Documentation of actual closure times provided
following each closure
• Periodic, structured review of lane rental hours
and fee calculations to make sure each party
agrees with amounts

18. COLLABORATE. INNOVATE. EDUCATE.
Keys to Success
• Before/During Procurement
– Evaluate mobility needs near beginning of
procurement
– Give clear direction to proposers in draft contract
documents
– Be open to feedback from proposers and consider
changes

19. COLLABORATE. INNOVATE. EDUCATE.
Keys to Success
• During Design/Construction
– Work collaboratively with the contractor during
TCP design to make sure public’s needs are being
met
– Stay on top of tracking closures
• Future Projects
– Use lessons learned to improve later projects