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Office of Traffic, Safety and Technology Module 2 Temporary Traffic Control Overview Traffic Control Plan Development Course.

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Presentation on theme: "Office of Traffic, Safety and Technology Module 2 Temporary Traffic Control Overview Traffic Control Plan Development Course."— Presentation transcript:

1 Office of Traffic, Safety and Technology Module 2 Temporary Traffic Control Overview Traffic Control Plan Development Course

2 Office of Traffic, Safety and Technology 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 2

3 Office of Traffic, Safety and Technology 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 3

4 Office of Traffic, Safety and Technology Mn MUTCD Chapter 6B 4

5 Office of Traffic, Safety and Technology 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 5

6 Office of Traffic, Safety and Technology Mn MUTCD Chapter 6B  Seven fundamental principles of TTC 1.General plans or guidelines should be developed 2.Road user movement should be inhibited as little as practical 3.Motorists, bicyclists, and pedestrians should be guided in a clear and positive manner 4.Routine day and night inspections of TTC elements should be performed 5.Attention should be given to the maintenance of roadside safety 6.Training appropriate to the job 7.Maintain good public relations 6 Page 2-2 through page 2-3

7 Office of Traffic, Safety and Technology Legal Authority for Transportation  Legal authority for transportation is found in the Minnesota Statutes, Chapters 160 to 174A 7

8 Office of Traffic, Safety and Technology Federal Regulations  Title 23 of the United States Code (U.S.C) –outlines the role of highways in the United States Code (www.ecfr.gov/)www.ecfr.gov/ –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 AppendixSubpart J and K 8

9 Office of Traffic, Safety and Technology 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 9 MN MUTCD discussed on Page 2-10

10 Office of Traffic, Safety and Technology 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 10

11 Office of Traffic, Safety and Technology Associated Manuals and Guideline  Work Zone Manuals and Guidelines Website 11

12 Office of Traffic, Safety and Technology 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 12

13 Office of Traffic, Safety and Technology 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 13

14 Office of Traffic, Safety and Technology 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 14

15 Office of Traffic, Safety and Technology 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 15

16 Office of Traffic, Safety and Technology 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 16

17 Office of Traffic, Safety and Technology Associated Manuals and Guideline  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 websiteEnterprise 17 Page 2-14

18 Office of Traffic, Safety and Technology Associated Manuals and Guideline  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 18 More info in Section 2.7.3

19 Office of Traffic, Safety and Technology Associated Manuals and Guideline  2012 CMS Manual of Practice –Guide for MnDOT internal stakeholders and external stakeholders –Info on allowable and prohibited messages 19

20 Office of Traffic, Safety and Technology 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 Office of Traffic, Safety and Technology 21 Signing Overview  Associated Manuals –Standard Signs Summary

22 Office of Traffic, Safety and Technology 22 Size of Sign Example  So What? –24” x 30” –48” x 96” From Signs 101

23 Office of Traffic, Safety and Technology Associated Manuals and Guideline  Additional Manuals and Guidelines –Previous discussions were a sampling –Fully investigate Work Zone website –Resources are constantly updated 23

24 Office of Traffic, Safety and Technology 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 JCode of Federal Regulations, Title 23 Part 630, Subpart J 24

25 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo  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 25 Page 2-20

26 Office of Traffic, Safety and Technology 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 26

27 Office of Traffic, Safety and Technology 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 27

28 Office of Traffic, Safety and Technology 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 28

29 Office of Traffic, Safety and Technology 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 29

30 Office of Traffic, Safety and Technology 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 30

31 Office of Traffic, Safety and Technology 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 31

32 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo 32

33 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo 33

34 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo 34

35 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo 35

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

37 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo –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 37 Att. A Page 2-32

38 Office of Traffic, Safety and Technology Att. B Page 2-36 Work Zone Safety Mobility Tech Memo  Refer to Attachment B 38

39 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo 39

40 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo 40

41 Office of Traffic, Safety and Technology Work Zone Safety Mobility Tech Memo  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 41 Page 2-24

42 Office of Traffic, Safety and Technology Planning for TTC  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 42 Page 2-39

43 Office of Traffic, Safety and Technology 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 43

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

45 Office of Traffic, Safety and Technology 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 - 45

46 Office of Traffic, Safety and Technology 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 46

47 Office of Traffic, Safety and Technology 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 47

48 Office of Traffic, Safety and Technology 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 48

49 Office of Traffic, Safety and Technology 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) 49

50 Office of Traffic, Safety and Technology 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 50

51 Office of Traffic, Safety and Technology Planning for TTC  Agency Determined Workers Present Speed Limit –Only requires: In Work Zone Workers Present Determined by DTE or designee 51

52 Office of Traffic, Safety and Technology 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) 52

53 Office of Traffic, Safety and Technology TEM  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 53 Page 2-41

54 Office of Traffic, Safety and Technology TEM  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 54 Page 2-39 through Page 2-44

55 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 55 Page 2-45

56 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 56

57 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 57

58 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 58

59 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 59

60 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 60

61 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 61

62 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 62

63 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 63

64 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 64

65 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 65

66 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 66

67 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 67

68 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 68

69 Office of Traffic, Safety and Technology TEM Appendix  Traffic Management Plan Checklist 69

70 Office of Traffic, Safety and Technology TMP Development  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 70 Page 2-52

71 Office of Traffic, Safety and Technology 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 71

72 Office of Traffic, Safety and Technology 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 72

73 Office of Traffic, Safety and Technology 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 73

74 Office of Traffic, Safety and Technology 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 74

75 Office of Traffic, Safety and Technology 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 75

76 Office of Traffic, Safety and Technology Pedestrian Treatments  Background –ADA of 1990 –Adoption of PROWAG –Tech Memo TR-01 76

77 Office of Traffic, Safety and Technology Tech Memo T-02  Introduction –Ped facilities required on public ROW for disabled  Purpose –Planning and design guidance for accessible ped facilities 77

78 Office of Traffic, Safety and Technology Tech Memo T-02  Guidelines –Scoping –New construction and reconstruction –Alteration Projects –Preventative maintenance projects –Historical Properties –Accessibility during construction 78 Page 2-55 and Page 2-56

79 Office of Traffic, Safety and Technology Checklist for Peds in TTC 79

80 Office of Traffic, Safety and Technology Checklist for Peds in TTC 80

81 Office of Traffic, Safety and Technology Checklist for Peds in TTC 81

82 Office of Traffic, Safety and Technology Checklist for Peds in TTC 82

83 Office of Traffic, Safety and Technology End of Chapter 2  Questions? 83


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