1. Traffic Control Plan Development Course
Module 2
Temporary Traffic Control Overview

2. General A Temporary Traffic Control (TTC) Zone (aka Work Zone)
Work Space
Incident
Controlled by
TTC Devices (Chapter 3)
Flaggers
Uniformed Law Enforcement
Other Authorized Personnel

3. General Safety is a PRIMARY concern Must provide:
safe work place
safe route for the pedestrian
safe route for the motorist
This Manual/Course cover longer term TTC that will require plans

4. Mn MUTCD Chapter 6B

5. Mn MUTCD Chapter 6B
Fundamental Principles of Temporary Traffic Control
Construction, maintenance, utility, and incident zones can all benefit from TTC
Special plans preparation and coordination required
Commercial vehicles might need to follow a different route
Following the fundamental principles of Part 6 will
assist road users
help protect workers in the vicinity of TTC zones

6. Mn MUTCD Chapter 6B Seven fundamental principles of TTC
Page 2-2 through page 2-3
Seven fundamental principles of TTC
General plans or guidelines should be developed
Road user movement should be inhibited as little as practical
Motorists, bicyclists, and pedestrians should be guided in a clear and positive manner
Routine day and night inspections of TTC elements should be performed
Attention should be given to the maintenance of roadside safety
Training appropriate to the job
Maintain good public relations

7. Legal Authority for Transportation
Legal authority for transportation is found in the Minnesota Statutes, Chapters 160 to 174A

8. Federal Regulations Title 23 of the United States Code (U.S.C)
outlines the role of highways in the United States Code (
Part 630 Subpart J covers Work Zone Safety and Mobility
Subpart K outlines Temporary Traffic Control Devices
A copy of Subpart J and K is included in the Appendix

9. Why Signs are Installed
MN MUTCD discussed on Page 2-10
Why Signs are Installed
Engineering Standards
MN MUTCD
A statement of required, mandatory, or specifically prohibitive practice regarding a traffic control device. The verb “shall” is typically used. Standards are sometimes modified by Options
A statement of recommended, but not mandatory, practice in typical situations, with deviations allowed if engineering judgment or engineering study indicates the deviation to be appropriate. The verb “should” is typically used. Guidance statements are sometimes modified by Options

10. Why Signs are Installed
Engineering Standards
MN MUTCD
A statement of practice that is a permissive condition and carries no requirement or recommendation. Options may contain allowable modifications to a Standard or Guidance. The verb “may” is typically used
An informational statement that does not convey any degree of mandate, recommendation, authorization, prohibition, or enforceable condition. The verbs “shall”, “should”, and “may” are not used in Support statements

11. Associated Manuals and Guideline
Work Zone Manuals and Guidelines Website

12. Associated Manuals and Guideline
Federal Manual on Uniform Traffic Control Devices
Federal Highway Administration (FHWA) publishes the MUTCD
all national design, application, and placement, standards, guidance, options, and support provisions for traffic control devices

13. Associated Manuals and Guideline
Minnesota Manual on Uniform Traffic Control Devices
Minnesota develops and adopts a state MUTCD
substantial conformance with the Federal MUTCD
updated in January 2014
Sections 6A through 6K

14. Associated Manuals and Guideline
Temporary Traffic Control Zone Layouts Field Manual (MN MUTCD Chapter 6K)
Part 6 of the MN MUTCD
reprinted as a separate document for use in field operations
contains the general Temporary Traffic Control (TTC)
Used by any MN entities to provide PROPER TTC

15. Associated Manuals and Guideline
Traffic Engineering Manual
updated by the MnDOT OTST
establish uniform guidelines and procedures
Chapter 8 is related to Work Zone Traffic Controls

16. Associated Manuals and Guideline
Standard Specifications for Construction (2014 Edition)
contains standard specifications
used and referred to in the design of
plans
Special Provisions
More info in Chapter 6

17. Associated Manuals and Guideline
Page 2-14
Minnesota IWZ Toolbox
For design of Intelligent Work Zones
Travel Time Information
Speed Advisory Information
Congestion Advisory
Stopped Traffic Advisory
Dynamic Merge - Late or Early
Traffic Responsive Temporary Signals
Etc.
Some Warrants at Enterprise website

18. Associated Manuals and Guideline
More info in Section
Work Zone Speed Limit Guidelines
provide a uniform guideline for the proper application of speed limits in street and highway work zones
Engineering judgment may dictate modifications

19. Associated Manuals and Guideline
2012 CMS Manual of Practice
Guide for MnDOT internal stakeholders and external stakeholders
Info on allowable and prohibited messages

20. Signing Overview Associated Manuals Minnesota Standard Signs Manual
The Standard Signs Manual contains a wide variety of standard signs that are used in the state

21. Signing Overview
Associated Manuals
Standard Signs Summary

22. Size of Sign Example
From Signs 101
So What?
24” x 30”
48” x 96”

23. Associated Manuals and Guideline
Additional Manuals and Guidelines
Previous discussions were a sampling
Fully investigate Work Zone website
Resources are constantly updated

24. Work Zone Safety Mobility Tech Memo
Subject:
Minnesota Work Zone Safety and Mobility Policy
Purpose:
To implement the requirements and guidelines contained in the Code of Federal Regulations, Title 23 Part 630, Subpart J

25. Work Zone Safety Mobility Tech Memo
Page 2-20
INTRODUCTION
Safety and mobility of road users and highway workers
Aging Highway System
All involved must commit to safety and mobility
Start early in the project
Carry through to the end

26. Work Zone Safety Mobility Tech Memo
Addressed in Three Levels
1. Project Level Procedures
Work Zone Mobility Impact Assessment
Transportation Management Plan (TMP)
Plans, Specifications and Estimates (PS&Es)
Project Temporary Traffic Control (TTC) Field Observations

27. Work Zone Safety Mobility Tech Memo
Addressed in Three Levels
2. District or Local Agency Level Process and Procedures
Establishment of a Work Zone Safety Coordinator
Operational Performance Information
Work Zone Crash Data Review

28. Work Zone Safety Mobility Tech Memo
Addressed in Three Levels
3. State Level Processes and Procedures
Statewide Work Zone Data
Statewide Field Reviews
Training
Process Feed-Back Discussions
Statewide Group Activities

29. Work Zone Safety Mobility Tech Memo
Scope
Apply to federal and non-federal aid
Should be implemented on maintenance and utility operations
PROJECT LEVEL PROCESSES AND PROCEDURES
Attention must be given to traffic mobility and safety from the early stages of development
Proper TMP can be developed

30. Work Zone Safety Mobility Tech Memo
Work Zone Mobility Impact Assessment
Identify the potential impact the project
provide guidelines for developing the strategies to mitigate
Implement a general traffic delay restriction policy for their jurisdiction
May have an established “Lane Closure Manual”
Metro Lane Closure Manual

31. Work Zone Safety Mobility Tech Memo
Work Zone Mobility Impact Assessment
If no Manual
On 2-lane 2-way roadways, traffic should not be stopped (such as a flagging operation) for greater than 15 minutes
On multi-lane roadways, traffic volumes should not exceed 1800 vehicles per hour per open lane

32. Work Zone Safety Mobility Tech Memo

33. Work Zone Safety Mobility Tech Memo

34. Work Zone Safety Mobility Tech Memo

35. Work Zone Safety Mobility Tech Memo

36. Work Zone Safety Mobility Tech Memo
Page 2-23 More info in Sec 2.8
Transportation Management Plan
Prepared with assistance of road authority
Tasks include listing all potential work zone impacted services, businesses

37. Work Zone Safety Mobility Tech Memo
Att. A Page 2-32
Refer to Attachment A
Project Characteristics
Travel and Traffic Characteristics
Corridor, Network and Community Issues
Design, Procurement and Construction Options
Work Zone Design and Safety Issues
TTC Strategy Considerations
TO Strategy Considerations
PI Strategy Considerations

38. Work Zone Safety Mobility Tech Memo
Att. B Page 2-36
Refer to Attachment B

39. Work Zone Safety Mobility Tech Memo

40. Work Zone Safety Mobility Tech Memo

41. Work Zone Safety Mobility Tech Memo
Page 2-24
Scope of the TMP (page 2-24)
Minimal to complex projects
Short duration may not require a TMP
Basic TMP shall have provisions for a TTC plan
Plans, Specifications, and Estimates (PS&Es)
Include appropriate provisions of the TMP
Pay Items
Responsible persons
Project TTC Field Observations
Drive through reviews
Revisions to TTC plans

42. Planning for TTC Oversize/Overweight Vehicles
Page 2-39
Oversize/Overweight Vehicles
Oversize/overweight (OSOW) vehicles need to be considered
May be difficult or impossible for OSOW vehicles to navigate the work zone
Contact the permits department

43. Planning for TTC Lane Width
In some TTC areas, reduced lane widths are used to maintain the number of lanes
Important to communicate with all interested departments

44. Source: Ken Johnson Presentation
Planning for TTC
Source: Ken Johnson Presentation
Speed Limits in Work Zones
MN Statutes , Subd. 5d went into effect August 1, 2014
Modified speed limits and fines in work zones

45. Planning for TTC Speed Limits in Work Zones
Speed limit in work zone when workers present
The speed limit on a road having an established speed limit of 50 mph or greater is adjusted to 45 mph in a work zone (remember definition) when…
At least one lane or portion of a lane of traffic is closed in either direction
Workers are present
Exceptions follow -

46. Planning for TTC Workers Present Speed Limit
The required work zone speed limit of 45 mph does not apply when…
Positive barriers are placed between workers and the traveled portion of the highway

47. Planning for TTC Workers Present Speed Limit
The required work zone speed limit of 45 mph does not apply when…
The work zone is in place for less than 24 hours

48. Planning for TTC Workers Present Speed Limit
The required work zone speed limit of 45 mph does not apply when…
“A different speed limit for the work zone is determined by the road authority following an engineering and traffic investigation, and based on accepted engineering practice”
24/7 construction speed limit
Commissioners Order required
Start with District Traffic, needs CO approval

49. Planning for TTC Workers Present Speed Limit
The required work zone speed limit of 45 mph does not apply when…
A reduced speed limit for the work zone is established by the road authority for a road under their jurisdiction when workers are present (an engineering and traffic investigation is not required)
No more than 20 mph on a street or highway with an established speed limit of 55 mph or greater
No more than 15 mph on a street or highway with an established speed limit of 50 mph or less
The “Other” Workers Present Speed Limit
or agency determined (see upcoming slide)

50. Planning for TTC Workers Present Speed Limit
The required work zone speed limit of 45 mph does not apply when…
Added in the proposed revision to the MN MUTCD
On the roadway of a divided highway with a median that does not include a TTC zone

51. Planning for TTC Agency Determined Workers Present Speed Limit
Only requires:
In Work Zone
Workers Present
Determined by DTE or designee

52. Planning for TTC What Projects May be Affected?
Types of projects that may be affected by this new law – required reduction
Pavement rehabilitation (reclaim and overlay, mill and overlay, overlay, chip seals, micro surfaces)
Pavement patching and crack sealing
Reconstruction projects
Multi-day culvert replacement (at one location)
Bridge construction/repair
Installation of an intersection traffic control device (e.g. traffic signal or roundabout)

53. TEM 8-4.00 8-4.01 Temporary Traffic Control Goals
Page 2-41
Temporary Traffic Control Goals
Strive for the greatest payoff in terms of safety and convenience
What is the likelihood of motorists failing to negotiate the work zone safely?
What are the consequences of such action on pedestrians, workers, or other motorists?
Goals
to minimize crashes and crash severity; and
to minimize inconvenience and conflicts as a result of the work

54. TEM
Page through Page 2-44
Traffic Management and Temporary Traffic Control Plan
Purpose of the TMP
Scope of the TMP
Temporary Traffic Control Plan
Responsibility
Preliminary Design
Detail Design
Construction

55. TEM Appendix
Page 2-45
Traffic Management Plan Checklist

56. TEM Appendix
Traffic Management Plan Checklist

57. TEM Appendix
Traffic Management Plan Checklist

58. TEM Appendix
Traffic Management Plan Checklist

59. TEM Appendix
Traffic Management Plan Checklist

60. TEM Appendix
Traffic Management Plan Checklist

61. TEM Appendix
Traffic Management Plan Checklist

62. TEM Appendix
Traffic Management Plan Checklist

63. TEM Appendix
Traffic Management Plan Checklist

64. TEM Appendix
Traffic Management Plan Checklist

65. TEM Appendix
Traffic Management Plan Checklist

66. TEM Appendix
Traffic Management Plan Checklist

67. TEM Appendix
Traffic Management Plan Checklist

68. TEM Appendix
Traffic Management Plan Checklist

69. TEM Appendix
Traffic Management Plan Checklist

70. TMP Development TMP Development Tips Start early Coordinate early
Page 2-52
TMP Development Tips
Start early
TMP development should start as early in the project development process as possible so that TMP strategies can be accounted for in the budgeting/scoping process
Coordinate early
Effective TMP is one that has input from all of the key players in the project development process
Ensure all are involved from the start of TMP development

71. TMP Development TMP Development Tips
Use templates, guidance and other tools
Templates, guidance, and other standardized agency resources help ensure that TMPs within an agency are consistent
These tools also simplify TMP development by helping those developing TMPs understand what is expected for agency TMPs
Provide TMP Training
Helps ensure consistent TMPs
Also helps personnel understand why TMPs are important
Helps gain management buy-in for TMPs, as management support is needed for effective TMP efforts

72. TMP Development TMP Development Tips
Assess, Monitor and Update the TMP
Include funding for monitoring traffic conditions during construction to track TMP effectiveness
Can be a challenge because it requires additional time beyond just developing the TMP
Monitoring and updating the TMP as the project progresses or new potential impacts are discovered is important to ensuring the TMP remains effective at increasing work zone safety and mobility

73. TMP Development TMP Development Tips Document everything
TMP becomes a written history of the project
If design and development decisions are well documented, time, energy and money can be saved in the development of the project, as well as future projects
A brief standardized report at the completion of major projects that describes the TMP development and implementation process and outcomes can be very beneficial to future projects

74. TMP Development TMP Development Tips Understand diversion rates
Accurate estimates of diversion rates can be useful
Some people will divert to an alternate route
This reduction in demand may make a broader range of construction and MOT options feasible, possibly reducing project or TMP cost
Facilitate use of alterative routes
Look into the feasibility of alternate routes early in the TMP process
If improvements are needed to alternate routes, schedule that work at least a year prior to the project so that the alternate routes can be ready for use once the project begins

75. TMP Development TMP Development Tips
Use strategies that keep lanes open
Some examples are imposing damages for late lane opening; contract incentives/disincentives; narrowing lane widths or occasionally using shoulders during peak periods to maintain the number of lanes; night work
Consider using extended closures vs. full closures vs. numerous night closures
Extended and full closures can greatly reduce overall construction time and in many studies, it has been found that the public prefers one long-term closure to numerous smaller closures because the work can be completed sooner

76. Pedestrian Treatments
Background
ADA of 1990
Adoption of PROWAG
Tech Memo TR-01

77. Tech Memo 12-03-T-02 Introduction Purpose
Ped facilities required on public ROW for disabled
Purpose
Planning and design guidance for accessible ped facilities

78. Tech Memo 12-03-T-02 Guidelines Scoping
Page and Page 2-56
Guidelines
Scoping
New construction and reconstruction
Alteration Projects
Preventative maintenance projects
Historical Properties
Accessibility during construction

79. Checklist for Peds in TTC

80. Checklist for Peds in TTC

81. Checklist for Peds in TTC

82. Checklist for Peds in TTC

83. End of Chapter 2
Questions?