1. Traffic Control Plan Development Course
Module 3
Devices and Materials

2. TTC Zone Devices All shall conform to Specs, MN MUTCD, etc.
Page 3-1
All shall conform to Specs, MN MUTCD, etc.
Placed where they convey message most effectively

3. Traffic Signing Guide Signs Guidance through work zones
Should not interfere with necessary regulatory and warning signs
Common: Advance Notice Guide Sign
Those with date
Those with exact location

4. Traffic Signing Regulatory and Warning Signs MN MUTCD Parts 2 and 6
Also see handout in Section 3.12

5. Traffic Signing Supplemental Sign Plates Separate demountable plates
Have proper legend
Proper letters size and series
Properly fastened to sign face
Same retroreflective material as sign face
Sheeting oriented same as the sign face

6. Traffic Signing Temporary Sign Covering
Care in placement not to damage permanent sign
Avoid the use of ropes, wire fasteners or strapping
Do not apply tape to the sign sheeting surface
Do not use paper or plastic covers

7. Traffic Signing Sign Panel Overlays Additional Information
Care in placement to preserve sign inplace
Additional Information
MN MUTCD Part 6F (Later)

8. Business Signing
Handout from approved new language to be added to TEM Chapter 8
Be sure to check for updates

9. Proposed TEM 8-5 8-5.02.030 Temporary Business Signing in Work Zones
Construction projects have frequently caused disruption of traffic patterns in business areas
Temporary business signs are used to improve
driver guidance
create safer operations
reduce the impact on businesses created by construction activities and detours

10. Proposed TEM 8-5
Page 3-4
Location and Installation of Temporary Business Signs
Shall not interfere with permanent or construction signing
Hierarchy for sign installation
Regulatory
warning (permanent and construction)
Guide sign

11. Proposed TEM 8-5 Minimize multiple sign structures Minimum distances
Not installed on freeways (are exceptions)
Funding

12. Proposed TEM 8-5 8-5.02.032 Temporary Business Signing Plan Guidelines
District to study all local business
Estimate the extent and impact
“traffic sensitive” or “regionally sensitive”
Work with businesses

13. Proposed TEM 8-5 8-5.02.033 Types of Temporary Business Signs
Design to guide through easy decisions
Trailblazing that is understandable
First encountered should be generic in business names

14. Proposed TEM 8-5
Page 3-6
Business Access Signs

15. Proposed TEM 8-5
Business Service Signs

16. Proposed TEM 8-5
Business Identification Signs

17. Proposed TEM 8-5
Page 3-10
Temporary Business Guide Signs

18. Business Impact Mitigation
Purpose to:
Involve businesses more in the project development process
Keep businesses informed regarding project issues
Help businesses understand a project and its potential impacts
Mitigate construction impacts to businesses as feasible (Includes reducing and, if practical, preventing negative impacts to businesses)

19. Business Impact Mitigation
Threshold Criteria
Substantial business impacts?
If Yes
Designate a project Business Liaison
Use the Business Impact Mitigation Checklist
Follow the guidelines in the Guidelines section

20. Business Impact Mitigation
Responsibilities of Business Liaison
Consult with affected businesses before and during construction
Investigate means of mitigating project impacts to businesses
Provide information to the businesses before and during construction

21. Business Impact Mitigation
Guidelines
Use the Business Impact Mitigation Checklist
Identify Businesses
Early in Scoping, identify small businesses in the project area (not just within the project termini)
List potentially-affected businesses and their contact information

22. Business Impact Mitigation
Guidelines
Contact Business Owners
Provide information on the project in written format
Provide contact information for the Business Liaison
Work with businesses to identify potential concerns, and determine preferred methods for future project communications

23. Business Impact Mitigation
Guidelines
Identify Potential Impacts
Determine the resources needed to identify and evaluate potential impacts
Does the project have unique characteristics?
businesses in the area have any unique issues?
Is there a need for specific expertise?
Does the project scale warrant extra resources?

24. Business Impact Mitigation
Guidelines
Contact Local Governments
Consult with city and county governments to identify potential impacts and discuss potential mitigation measures
Contact MN Dept. of Employment and Economic Development
Assistance in determining a list of business-development organizations that may offer resources to affected businesses

25. Pavement Markings in TTC
Page 3-17
Definitions
Final Pavement Marking
The pavement marking that will be installed until the next time the pavement marking is scheduled to be renewed (typically one or more years). Final markings would include full length centerline markings, edgelines and messages

26. Pavement Markings in TTC
Definitions
Temporary Pavement Marking
the pavement marking that will be installed in staged long-term temporary traffic control zones
The temporary markings will either be removed or covered with another pavement surface prior to the application of the final markings
The temporary markings would include full length centerline markings, edgelines and messages. All temporary pavement markings shall be in conformance Part 6 and Part 3 of the MN MUTCD

27. Pavement Markings in TTC
Definitions
Interim Pavement Marking
any pavement markings that are not the final marking or is temporarily placed for staging purposes
Temporary Raised Pavement Marker (TRPM)
retroreflective pavement markers applied to the roadway surface which maintain retroreflective properties during wet weather conditions
TRPMs are used alone to substitute for pavement marking segments or to provide wet weather capabilities to other pavement markings

28. Pavement Markings in TTC
Interim Marking Guidelines
Projects greater than 1.25 miles in length
use the same cycle length as final pavement markings
minimum of 2 feet in length
Projects >350 feet, < 1-1/4 miles in length
Match the cycle length on either end
See Figure 6F-8a and 8b of MN MUTCD

29. Pavement Markings in TTC
Temporary Pavement Marking Guidelines
Give traffic clear path to follow
Typically, markings for staging are temporary
Of pavement to be overlaid or reconstructed, temp tap or marking paint, or epoxy can be used

30. Pavement Markings in TTC
Page 3-19
Wet Retro-reflective Properties
Retains retroreflectivity, presence, and color when wet or submerged in water
Consist of
Solid temporary pavement marking tape lines supplemented with TRPMs (temporary raised pavement markings) or
Solid temporary wet retroreflective pavement marking tape lines or
Solid pavement marking paint or epoxy lines supplemented with TRPMs (temporary raised pavement markings) or
Solid wet retroreflective pavement marking paint or epoxy lines

31. Pavement Markings in TTC
Final Pavement Markings
Refer to TEM Chapter 7
Temporary Raised Pavement Markings
May be used to simulate solid lines
See Standards for TRPMS on APL/QPL

32. Pavement Markings in TTC
Temp. Pavement Markings Tech Memo
TM T-02
Provide an appropriate pavement marking on all highways, 365 days per year
An appropriate pavement marking is one that meets or exceeds the standards defined in the MN MUTCD
During winter weather events, pavement markings should provide presence after pavement is clear of snow and ice

33. Pavement Markings in TTC
Pavement Marking Removal Scarring
Removed marking can be confusing
Overly aggressive techniques can leave scars

34. Pavement Markings in TTC
Spec Book on Pavement Marking Removal

35. Pavement Markings in TTC
Special Provisions

36. Channelizing Devices
Classified into 3 types
Type A
Type B
Type C

37. Channelizing Devices
Quick Reference Chart

38. Temporary Traffic Barriers
A number of temporary barriers are used for temporary traffic control

39. Temporary Traffic Barriers
Proper temporary barrier system selection and design involves the consideration of a number of specific factors
NCHRP Report 350
Duration and ease of installation, maintenance, and removal
Exposure and safety risks for workers and road users
Expected frequency and severity of impacts
Available space for barrier installation and lateral deflection

40. Temporary Traffic Barriers
MN MUTCD Section 6F.85, five primary functions
To keep motor vehicle traffic from entering work areas, such as excavations or material storage sites;
To separate workers, bicyclists, and pedestrians from motor vehicle traffic;
To separate opposing directions of motor vehicle traffic; and
To separate motor vehicle traffic, bicyclists, and pedestrians from the work area such as false work for bridges and other exposed objects; and
To protect drop-offs of greater than 12 inches on longer term projects when a suitable buffer lane cannot be provided

41. Temporary Traffic Barriers
Crashworthiness
Crashworthy
Characteristic of roadside devices that have been successfully crash tested in accordance with a national standard such as the National Cooperative Highway Research Program Report 350, “Recommended Procedures for the Safety Performance Evaluation of Highway Features
All temporary traffic control devices shall be crashworthy
FHWA requires successful crash testing in accordance with the NCHRP Report 350 or AASHTO MASH

42. Temporary Traffic Barriers
Crashworthiness
Key Points of MASH
All new testing will be done following MASH evaluation techniques
Hardware accepted under NCHRP Report 350 is appropriate for replacement and new installation
Retesting is not required
As of January 1, 2011, all new products must be tested using MASH crash test criteria for use on the National Highway System (NHS)

43. Temporary Traffic Barriers
Anchoring
To control or eliminate lateral deflection close to pavement edge drop-offs and in other situations where deflection space is limited, barrier sections may be anchored to the pavement
Bridge Department has a memo, “Interim Guidance for Installation of Temporary Barriers on Bridges and Approach Panels”

44. PPCB
Majority of temporary barriers used in Minnesota are portable precast concrete barriers
MN MUTCD for Info

45. Moveable Barrier
Source: Barrier Systems Inc.

46. Portable Non-Concrete Barrier
PPCB is the most widely used positive protection device in use today
PPCB does have a low initial cost and are readily available
They also are quite heavy and creates issues when required on a bridge project and during transport
Other barrier systems (such as steel) are available
Generally higher upfront cost

47. Water Filled Barrier Water-filled barrier in APL
Barriers shall be certified by the FHWA as meeting or exceeding the requirements of the NCHRP 350
The installer shall install according to the manufacturer's installation instructions

48. Barrier End Treatments
Upstream leading ends that are present shall be appropriately flared or protected with properly installed and maintained crashworthy cushions

49. Barrier End Treatments
Crash cushions
systems that mitigate the effects of errant vehicles that strike obstacles, either by
smoothly decelerating the vehicle to a stop when hit head-on
redirecting the errant vehicle
A typical barrier end treatment can be found at,

50. Truck Mounted Attenuators
Energy-absorbing devices attached to the rear of shadow trailers or trucks
When used, the shadow vehicle with the attenuator is located in advance of the work area, workers, or equipment to reduce the severity of rear-end crashes from errant vehicles
Vehicle is positive protection for the workers and the attenuator is positive protection for the driver

51. Surface Mounted (Centerline) Delineators
Page 3-29
Devices that may be used as center lane dividers

52. Portable Changeable Message Signs (PCMS)

53. Portable Signal Sytems
Portable Traffic Control Signals are either Trailer Mounted or Pedestal Mounted
Approved products and specifications for portable signal systems can be found on the APL

54. Automated Flagging Assist Device
Enable the operator to be positioned out of the lane of traffic
Capable of displaying a STOP message followed by a SLOW message without the need for a flagger
Can be remotely operated by a one operator
Single operator may only be used on roadways with unobstructed sight lines, less than 1500 ADT, and less than 1000 feet between the devices

55. Flashing Arrow Boards
Part 6 of MN MUTCD
See APL/QPL

56. Crash Cushions and Attenuators
Non-Redirective (Gating)
Redirective (Non-Gating)

57. Ballast Sandbags are the most common ballast
Should be constructed of a material which will allow the bag to break and disperse
Other ballasting systems may be used on some temporary traffic control devices provided they are crashworthy.

58. Approved/Qualified Products (APL/QPL)
list of approved products

59. MN MUTCD 6F.1 Types of Devices 6F.2 General Characteristics of Signs
6F.3 Sign Placement

60. MN MUTCD

61. MN MUTCD

62. MN MUTCD 6F.4 Sign Maintenance 6F.5 Regulatory Sign Authority
6F.6 Regulatory Sign Design
6F.7 Regulatory Sign Applications
Refer to other section in MN MUTCD

63. MN MUTCD
Type A Channelizing Devices
Figure 6F-7

64. MN MUTCD
6F.77 Pavement Markings
Figure 6F-8a

65. MN MUTCD

66. MN MUTCD
6F.85 Temporary Traffic Barriers

67. MN MUTCD
6F.86 Crash Cushions
6F.87 Rumble Strips
6F.88 Screens