Office of Traffic, Safety and Technology Module 4 Work Zone Applications Traffic Control Plan Development Course

Office of Traffic, Safety and Technology Common Work Zone Projects  A wide variety of projects for TTC exist  Some include: –Mill and Overlay –CPI –Left turn lane construction –Bridge deck repair –ADA jobs –Full reconstruction (cross-over & detour) 2

Office of Traffic, Safety and Technology Common Work Zone Projects  Cont. –Bridge painting –Centerline Rumbles 3

Office of Traffic, Safety and Technology Control Strategies  Temporary traffic control strategies, devices, and contracting/ construction techniques and coordination are used to facilitate traffic flow and safety through and around work zones 4

Office of Traffic, Safety and Technology Control Strategies  Construction Phasing/Staging –Staging refers to how the contractor will position the equipment and materials –Phasing refers to the sequencing of the aspects of the project-one project at a time –The impacts of a work zone on traffic can be minimized by using operationally-sensitive phasing and staging throughout the life of the project 5

Office of Traffic, Safety and Technology Control Strategies  Full Roadway Closures –Involves complete closure of a roadway for periods of time to minimize the duration of the project and improve worker safety –Closures maybe brief, short-term or long- term –Lane shifts or closures last for varying durations of time 6

Office of Traffic, Safety and Technology Control Strategies  Reduced Lane Widths to Maintain Number of Lanes (Constriction) –Involves reducing the width of one or more lanes to maintain the existing number of lanes –Reduce shoulder width to maintain number of lanes –Shoulder closures –Lane shift to shoulder/median 7

Office of Traffic, Safety and Technology Control Strategies  One-Lane, Two-Way Operation –Involves using one lane for both directions of traffic, allowing work activities to occur in the other lane that is now closed 8

Office of Traffic, Safety and Technology Control Strategies  Two-Way Traffic on One Side of Divided Facility (Crossover) –Involves closing one side of a divided facility to permit the work to proceed without traffic interference while both directions of traffic are accommodated on the opposing side of the roadway 9

Office of Traffic, Safety and Technology Control Strategies  Reversible Lanes –Also known as variable lanes or contra-flow lanes, involves sharing lane(s) of travel to accommodate peak-period traffic flow 10

Office of Traffic, Safety and Technology Control Strategies  Ramp Closures/Relocation –Closing one or more ramps in or near the work zone for specific time periods or construction phases to allow work access or improve traffic flow on the mainline 11

Office of Traffic, Safety and Technology Control Strategies  Freeway-To-Freeway Interchange Closures –Involves closing one or more freeway-to- freeway interchange connectors over a period of time 12

Office of Traffic, Safety and Technology Control Strategies  Night Work –Work is performed at night (end of evening peak period to beginning of morning peak period) to minimize work zone impacts on traffic and adjacent businesses 13

Office of Traffic, Safety and Technology Control Strategies  Weekend Work –Construction work (all or individual phases) is restricted to weekend periods from the end of the Friday afternoon peak period to the beginning of the Monday morning peak period 14

Office of Traffic, Safety and Technology Control Strategies  Work Hour Restrictions for Peak Travel –Restricting work hours of the work that may impact traffic does not occur during periods of peak travel demand and congestion (e.g., peak hours, holidays, and special events) 15

Office of Traffic, Safety and Technology Control Strategies  Pedestrian/Bicycle Access Improvements –Involves providing alternate facilities for bicyclists and pedestrians (including those with disabilities in accordance with the Americans with Disabilities Act of 1990) in places where the work zone impacts their accessibility 16

Office of Traffic, Safety and Technology Control Strategies  Business Access Improvements –Some projects will have a direct impact on businesses, particularly to accessibility –Accessibility improvements for businesses may include signage or information to direct motorists to the business(es) and/or relocation of access locations 17

Office of Traffic, Safety and Technology Control Strategies  Off-Site Detours/Use of Alternate Routes –Involves re-routing some or all traffic off of the roadway under construction and to other existing roadways 18

Office of Traffic, Safety and Technology MUTCD Work Zone Layout  Common Work Zone Layouts –Trained Editorial Discussion –Keeping Editorial No-nonsense 19 (TED) (KEN)

Office of Traffic, Safety and Technology MUTCD Work Zone Layout  6J-I General –These layouts should be used during the development of detailed traffic control plans –They should only be used under the direction of a traffic engineering professional –They should be combined with the principles and figures contained elsewhere in this manual 20

Office of Traffic, Safety and Technology MUTCD Work Zone Layout  Symbols 21

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Office of Traffic, Safety and Technology MUTCD Work Zone Layout  TTC Template Sheets for Stationary Work Zones  e/ttc-templets.html#metro e/ttc-templets.html#metro 48

Office of Traffic, Safety and Technology Barrier Use  Positive Work Zone Protection –Title 23 CFR (a) indicates that the need for longitudinal traffic barrier and other positive protection devices shall be based on an engineering study 49

Office of Traffic, Safety and Technology Barrier Use  Positive Work Zone Protection –Use positive protective measures to separate workers on highway construction projects –Use temporary longitudinal traffic barriers to protect workers on highway construction projects in long-duration stationary work zones when the project design speed is anticipated to be high & the nature of the work requires workers to be within 1 lane- width from the edge of a live travel lane 50

Office of Traffic, Safety and Technology Barrier Use  Positive Work Zone Protection –When positive protective devices are necessary, those devices are paid for on a unit-pay basis, unless doing so would create a conflict with innovative contracting approaches, such as designbuild or some performance-based contracts 51

Office of Traffic, Safety and Technology Barrier Use  Work Zone Drop-Offs –Additional channelizing devices should be placed in areas that may be considered hazardous to the public or workers Full longitudinal channelizing when traffic is adjacent to longitudinal drop-offs greater than 4 inches Full longitudinal channelizing and barriers when traffic is adjacent to longitudinal drop-offs greater than 12 inches Full longitudinal channelizing when roadway geometry, dust, weather, or darkness restricts visibility of the open travel lane 52