Stationary And Slowly Moving Work Zones On Rural And Urban Roads. Kenneth A. Swain

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1 Stationary And Slowly Moving Work Zones On Rural And Urban Roads Kenneth A. Swain

2 Session Objectives Identify procedures for the placement of Short Term Stationary and Slowly Moving Work Zones on rural or urban roadways. Provide a basic understanding on planning work zones Identify typical deficiencies found in work zones that increase accident risk.

3 Developing A Work Zone Plan Planning is critical to the efficient and safe performance of work zones and related traffic control activities. Planning will anticipate actions you need to take

4 Developing the Plan Prior to the start of any work activity there are key factors to be addressed in a work zone plan. Addressing these factors can minimize potential negative impact and liability on the work operation

5 Key Factors To Be Addressed Work Classification Stationary Moving Work Location On Roadway Off Roadway

6 Factors Description of work Pavement repair Shoulder repair Ditching etc.

7 Factors Scope of the operation Number of lanes Length of the work area Duration Mobile (< 15 Min.) Short Duration (< 60 Min.) Short Term (1 Day) Long Term (More Than 1 Day)

8 Factors Occupancy Time Time required to perform the Work Time required for setting, cooling or curing Delay time Traffic control set-up/takedown

9 What Factors Affect Occupancy Time? Type and amount of work Efficiency of crew Type of equipment/condition Weather Traffic

10 Capacity Problems Congestion Back-ups Delays

11 Now that we are aware of factors that can affect our plan Lets identify typical problems found in work zones that impact motorists

12 Insufficient Advanced Warning Inadequate signs Insufficient distance in which to respond Unclear instructions

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14 Inadequate Guidance Or Delineation Lack of information Poorly placed devices Conflicting pavement markings

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16 Conflicts Created By The Work Activity Equipment operating or stored outside protected area

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18 Poor Housekeeping Debris on roadway Water or mud on pavement Warning devices dirty Non-functioning devices

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20 Distractions To Motorists Unusual traffic control techniques or devices

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22 Additional Factors To Consider Avoid peak travel periods Avoid holiday periods on primary routes Avoid starting major projects on Fridays, or Mondays after holidays

23 Additional Factors To Include Proper instruction to work crews Insure that proper equipment and tools are available prior to leaving the facility

24 Addressing these factors prior to setting up your work zone can minimize your liability in the event an accident occurs

25 Now lets take a look at the five components of a work zone

26 Termination Area 5 Components Of A Work Space Traffic Control Zone Buffer Space Transition Area Advanced Warning Area

27 Termination Area Work Space Buffer Space Transition Area Advanced Warning Area

28 Termination Area Work Space Buffer Space Transition Area Advanced Warning Area

29 Termination Area Work Space Buffer Space Transition Area Advanced Warning Area

30 Termination Area Work Space Buffer Space Transition Area Advanced Warning Area

31 Termination Area Work Space Buffer Space Transition Area Advanced Warning Area

32 Workzone Traffic Control Signs are used to Warn, Guide or Advise, they instruct the motorist how to proceed through the worksite. On most highways where speeds range from moderate to fast three advanced warning signs are typically used.

33 Work Zone Traffic Control The First Sign is used to attract the drivers attention The Second Sign should provide specific information about the situation ahead The Third Sign instructs the motorist what action is being taken Road Work Ahead One Lane Road Ahead Flagger Ahead Symbol

34 Flagger Symbol One Lane Road Ahead Roadwork Ahead

35 Principles Of Sign Placement Locate signs where they can be seen. Place signs so that drivers have time to respond. Signs should generally be placed on the right side of the roadway.

36 Let s look at some slides to see if they meet the sign placement criteria.

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43 Moving Work Zones And Special Procedures

44 Moving/Mobile Work Zones Mobile work zones differ from stationary work zones Mobile work zones include intermittent stops Vehicle mounted devices are often required Let s look at a couple of these devices!

45 Moving Workzones/Special Procedures Truck Mounted Signs Truck Mounted Arrowboard Truck Mounted Impact Attenuator (TMIA)

46 Truck Mounted Sign

47 TMIA

48 Let s look at some typical Moving and stationary work Zones

49 Work Outside Of Shoulder Stationary Conventional highway Work area beyond shoulder Sign Portable Sign placement Low speed < 40mph ft High speed > 40mph ft

50 On Shoulder Short Duration Stationary or Moving Conventional highway Sign truck mounted Sign spacing Low speed < 40mph ft High speed > 40mph ft

51 Shoulder Stationary Operation Conventional highway Work Area on shoulder Sign placement Low speed < 40mph ft High speed > 40mph ft

52 Two Lane Mobile Operation Conventional highway Low Volume May use truck mounted sign Sign placement Low speed <40mph ft High speed >40mph ft

53 Two Lane Mobile Mowing Conventional/Expressway Mower encroaching on lane Maximum length of work zone 2 miles Sign placement Low speed <40mph ft High speed >40mph ft

54 Four Lane Divided Mobile Operation Conventional/Expressway Each vehicle equipped with static arrow or arrow board Sign spacing Low volume - slow moving 400ft ft High volume - Short Duration ft

55 Four Lane Divided Mobile Operation Conventional Roadway High Volume High Speed Each vehicle equipped with static arrow or arrow board and Sign First vehicle fully in lane should be equipped with TMIA