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 3.13

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
Refer to the Sign Framing, Installation and Covering Detail
Templates Website

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. Temporary Business Signing in Work Zones
8-6.02
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. Temporary Business Signing in Work Zones
Page 3-6
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. Temporary Business Signing in Work Zones
Minimize multiple sign structures
Minimum distances
Not installed on freeways (are exceptions)
Funding

12. Temporary Business Signing in Work Zones
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. Temporary Business Signing in Work Zones
Types of Temporary Business Signs
Design to guide through easy decisions
Trailblazing that is understandable
First encountered should be generic in business names

14. Temporary Business Signing in Work Zones
Page 3-8
Business Access Signs

15. Temporary Business Signing in Work Zones
Business Service Signs

16. Temporary Business Signing in Work Zones
Business Identification Signs

17. Temporary Business Signing in Work Zones
Page 3-12
Temporary Business Guide Signs

18. Pavement Markings in TTC Zones
Page 3-15
TEM
Through many work zones, traffic is moved from one lane to another
Traffic must be given clear direction as to which pathway to follow
Pavement marking modifications are required in long term TTC Zones (which are in place for 3 days or more) that contain transitions or alignment change areas

19. Pavement Markings in TTC Zones
Page 4-7
TEM
Layout 6J-1

20. Pavement Markings in TTC Zones
Page 3-16
TEM
Edge lines through transition and alignment change areas shall be marked with temporary pavement markings with wet retroreflective/recoverable properties
TEM applies to all MnDOT construction and maintenance activities with TTC zones of at least 350 feet in length on tangent sections and of 50 feet in length or longer on curves of 6 degrees or greater

21. Pavement Markings in TTC Zones
Page 3-16
TEM
Following are the minimum requirements for pavement markings prior to opening a road to traffic
Multi-lane Undivided Roadways - all double yellow centerlines, lane lines, and broken line stripe pavement markings
Multi-lane Divided Roadways - all lane lines
Three and Five Lane Roadways with Two-Way Left Turn Lanes - all solid yellow lines with yellow, broken line stripe pavement markings and lane lines (for five lane sections)
Two Lane Undivided Roadways - all centerlines

22. Pavement Markings in TTC Zones
Glossary
Pavement Markings Definitions
Temporary Pavement Marking
Pavement markings placed for staging of traffic on long term projects
Interim Pavement Marking
Pavement Markings that are a thinner marking applied in order to maintain traffic until the next lift or permanent markings can be placed

23. 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
Figure 6F-8a and 8b of MN MUTCD (later)
Interim Pavement Marking Template Sheet (next slide)

24. 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

25. Pavement Markings in TTC
Interim Marking Guidelines
Material specifications and tolerances will be the same as for final pavement markings
Exception: When final pavement markings are to be epoxy, and paint is used for interim solid lines, a 10-mil thick layer application of paint shall be used

26. Pavement Markings in TTC
Interim Marking Guidelines
In areas where paint or tape will not adhere to the surface, TRPMs may be used to simulate a centerline

27. Pavement Markings in TTC
Interim Marking Guidelines
The minimum required interim pavement markings shall be installed:
Prior to opening the roadway to traffic and
Should not be left in place for more than 14 calendar days unless they meet the requirements of temporary or final markings

28. Pavement Markings in TTC
Interim Marking Guidelines
Minimum required interim pavement markings include:
Multi-lane Undivided Roadways
all double yellow centerlines, interim lane lines, and interim broken line stripe pavement markings
Multi-lane Divided Roadways
all interim lane lines

29. Pavement Markings in TTC
Interim Marking Guidelines
Minimum required interim pavement markings include:
Three and Five Lane Roadways with Two-Way Left Turn Lanes
all solid yellow lines with yellow interim broken line stripe pavement markings and interim lane lines (for five lane sections)
Two Lane Undivided Roadways
all centerlines, turn lanes, bypass lanes, and outlines for any painted islands

30. Pavement Markings in TTC
Interim Marking Guidelines
If ADT < 1500 and the Project Engineer determines that it is not possible or practical to install interim pavement markings on Two Lane Undivided Roadways before opening the road to traffic
Figure 6F-8a in Part 6 of the MN MUTCD may be followed, also shown in Interim Pavement Marking Template Sheets
If the ADT > 400, then this layout shall be limited to three days

31. Pavement Markings in TTC
Temporary Pavement Marking Guidelines
Typically, markings for staging are temporary
The material used for temporary pavement markings should be selected based upon whether the marking is placed on the final surface (such as a lane shift crossing the final surface) or not, as well as how long the marking needs to last

32. Pavement Markings in TTC
Temporary Pavement Marking Guidelines
Typically, markings for staging are temporary
The material used should be based upon whether the marking is placed on the final surface (such as a lane shift crossing the final surface) or not, as well as how long the marking needs to last
Are to be installed to the same specifications as final pavement markings

33. Pavement Markings in TTC
Temporary Pavement Marking Guidelines
In tapers and transitions, should be installed at a minimum 6” in width
Removable preformed pavement marking tape, paint, or epoxy are typically used
Should be installed within 14 calendar days
Time limitations for installing temporary or final markings begin when construction operations first remove the inplace markings from the roadway

34. Pavement Markings in TTC
Temporary Pavement Marking Guidelines
Edge lines through transition and alignment change areas shall be marked with temporary pavement markings with Wet Retroreflective/Recoverable (WR) Properties
Discussion on upcoming slide, and page 3-19 of the manual

35. Pavement Markings in TTC
Temporary Pavement Marking Guidelines
The following WR pavement markings consist of a combination of one or more products to achieve the required properties
Temporary pavement marking tape lines supplemented with TRPMs
Temporary WR pavement marking tape lines
Pavement marking paint or epoxy lines supplemented with TRPMs
Pavement marking paint or epoxy lines with WR elements

36. 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

37. Pavement Markings in TTC
Final Pavement Markings
Refer to TEM Chapter 7
Temporary Raised Pavement Markings
TRPMs are normally used with construction zone markings
May be used to simulate solid lines
See Standards for TRPMS on APL/QPL

38. Pavement Markings in TTC
Page 3-17
TRPM Guidelines
TRPMs are to be replaced when they become damaged removed by traffic
TRPMs shall not be between October 1 and May 1 because of snowplowing operations
Another type is “peel and stick”
May be used to simulate solid lines
without the use of any other pavement marking material
used to supplement other types of pavement markings

39. Pavement Markings in TTC
Page 3-20
Pavement Marking Removal Scarring
Removed marking can be confusing
Overly aggressive techniques can leave scars

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

41. Pavement Markings in TTC
Special Provisions

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

43. Channelizing Devices Surface Mounted (Centerline) Delineators
Delineation devices that may be used as center lane dividers to separate opposing motor vehicle traffic on a two-lane, two-way operation
Are separate pay items for “Tube Delineator” and “Replace Tube Delineator”

44. Channelizing Devices
Quick Reference Chart

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

46. 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

47. 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

48. 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

49. 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)

50. 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”

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

52. Moveable Barrier
Source: Barrier Systems Inc.

53. 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

54. 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

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

56. 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,

57. 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

58. Portable Changeable Message Signs (PCMS)

59. Portable Signal Systems
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

60. 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

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

62. Little Know Resources MnDOT owned temporary bridge
Overhead sign structure
Dynamic Speed Display Signs (DSDS)
Automated flagger assistance device (AFADs)
Others?

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

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

65. MN MUTCD

66. MN MUTCD

67. 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

68. MN MUTCD
Page 3-66
Type A Channelizing Devices
Figure 6F-7

69. MN MUTCD
Page 3-77
6F.77 Pavement Markings
Figure 6F-8a

70. MN MUTCD

71. MN MUTCD
Page 3-85
6F.85 Temporary Traffic Barriers

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