Traffic Control FAQ

What Is Traffic Control?

Traffic control is the implementation of traffic management plans by trained personnel who use signs and equipment to safely guide vehicles and pedestrians through or around disruptions such as construction, utility work, public events, or emergencies.

While many people think of cones and flaggers, effective traffic control starts long before a crew arrives on-site. It involves an understanding of the streets/roadways involved, environmental and weather conditions, driver behavior, pedestrian movement, and regulatory compliance.

When done correctly, traffic control is barely noticeable — traffic flows smoothly, workers remain protected, and projects stay on schedule. When done incorrectly or ignored, it can lead to accidents, project shutdowns, and significant liability.

Why Does Traffic Control Matter?

Traffic control reduces risk by creating predictable driving conditions in unpredictable environments.

Work zones are among the most hazardous areas on public roads. According to the Federal Highway Administration (FHWA), there were more than 100,000 work zone crashes in the United States in 2022, resulting in over 37,000 injuries.

Traffic control helps prevent these incidents by:

  • Clearly directing drivers where to go
  • Creating safe buffer zones between traffic and workers
  • Managing pedestrian movement away from hazards
  • Maintaining access for emergency vehicles

Without proper traffic control, drivers are forced to react to unexpected conditions, which significantly increases the likelihood of accidents. Click here to read our blog on this subject.

When Is Traffic Control Required?

Traffic control is required whenever work will alter normal traffic patterns on a public right-of-way or introduce a roadway hazard. You likely need traffic control if:

  • A lane is closed or shifted
  • Workers are operating near active traffic
  • Equipment enters or occupies the roadway
  • Pedestrian pathways are disrupted
  • A permit is required for the work

Common situations include:

  • Utility and telecom work (electric, gas, water, fiber optics)
  • Municipal road projects (repairs, paving, signage, stormwater work)
  • Public events (parades, festivals, races, filming)
  • Emergency response (outages, downed lines, water main breaks)

Learn more in our blog about what infrastructure projects call for traffic control, as well as our blog on event types that need professional traffic control.

Important: Project size does not determine the need for traffic control. A small job on a busy road may require more protection than a large project on a low-traffic street.

Who Sets Traffic Control Standards?

Traffic control standards in the United States are governed by the Manual on Uniform Traffic Control Devices (MUTCD), published by the Federal Highway Administration (FHWA).

  • The MUTCD establishes national standards for signage, equipment, and work zone setup
  • States adopt the MUTCD and may add additional requirements
  • State Departments of Transportation enforce work zone regulations and permit requirements
  • Local municipalities may impose additional rules depending on the project

Because requirements vary by jurisdiction, working with an experienced traffic control provider helps ensure faster permit approvals and full compliance.

What Types of Traffic Control Equipment are Used?

Common equipment includes:

  • Traffic cones (retroreflective) that are designed to reflect headlights for visibility at night
  • Advance warning signs that alert drivers to upcoming changes in traffic conditions
  • Barricades and drums to physically separate traffic from work zones
  • Arrow boards to direct lane merges, especially on higher-speed roads
  • Portable message signs that provide real-time updates and detour information
  • STOP/SLOW paddles, used by certified flaggers to control traffic flow
  • High-visibility PPE, which is required safety apparel for all personnel near traffic

Proper placement, spacing, and maintenance of this equipment are critical for both safety and regulatory compliance. Read more about traffic control equipment in our blog.

Traffic control equipment is standardized under the MUTCD to ensure drivers recognize and respond consistently regardless of location.

What is a Maintenance of Traffic Plan (MOT)?

A Maintenance of Traffic Plan (MOT) is a broad plan for how traffic will be maintained during the entire project.

An MOT may include:

  • One or multiple Traffic Control Plan (TCP) drawings
  • Phasing of construction stages
  • Temporary traffic patterns
  • Detour routes
  • Pedestrian and bicycle accommodations
  • Traffic signal modifications
  • Construction staging areas

In most jurisdictions, an MOT must be submitted and approved before work begins. Failure to follow an approved plan can result in fines, delays, or stop-work orders.

What Is a Traffic Control Plan (TCP)?

A Traffic Control Plan (TCP) is a detailed, diagrammed document within an MOT that outlines exactly how traffic will be managed during a project.

A TCP typically includes information regarding:

  • Sign placement
  • Cones or channelizing devices
  • Lane closures or shifts
  • Arrow boards or message boards
  • Flagging stations
  • Pedestrian detours
  • Buffer zones and tapers

TCPs follow standards from the Manual on Uniform Traffic Control Devices (MUTCD) and state DOT guidelines.

What Do Traffic Control Services Include?

Traffic control services combine planning, personnel, and equipment to manage roadway safety throughout a project.

  • Precise planning: The traffic control service company will develop compliant MOTs and TCPs that meet state and local requirements, including DOT submission where applicable.
  • Flagging operations: Certified flaggers who will actively manage traffic flow, driver behavior, and site conditions in real time.
  • Lane closures and detours: Proper setup of tapers, buffer zones, and transitions based on roadway speed and type.
  • Equipment deployment and monitoring: Ongoing management to ensure cones, signs, and devices remain properly positioned and compliant throughout the project duration.
  • 24/7 emergency response: Rapid deployment for unplanned situations such as utility outages, gas leaks, or water main breaks.
  • Event traffic management: Coordination of road closures, pedestrian flow, and public safety for permitted events and public gatherings.

What Are Some Common Traffic Control Mistakes?

Improper traffic control is one of the leading causes of work zone incidents and project delays.

Common mistakes include:

  • Starting work without an approved MOT
  • Incorrect taper length or cone spacing
  • Missing or improperly placed signage
  • Using non-compliant or low-visibility equipment
  • Lack of certified flaggers on-site
  • Failing to maintain equipment throughout the project duration

Avoiding these issues requires both thorough planning before mobilization and active management during execution.

Do Utilities & Telecom Companies Need Traffic Control for Routine Work?

Yes. Any work that places workers near active traffic or affects the flow of vehicles and pedestrians typically requires a Maintenance of Traffic Plan (MOT) and certified flagging personnel, regardless of project size or duration. Requirements are governed by the MUTCD and enforced at the state and local level. Learn more in our blog.

How Long Does It Take to Get a Maintenance of Traffic Plan (MOT) Approved?

Approval timelines vary by jurisdiction and project complexity. State-level reviews can take several business days to several weeks, depending on the scope of work and road classification. Municipal approvals may move faster, but have their own requirements. Plans should be submitted well in advance of the project start date to avoid delays.

Who Is Responsible for Traffic Control Compliance?

The entity performing the work bears primary responsibility for traffic control compliance. This includes utilities, contractors, and municipalities. If a subcontractor is engaged for traffic control, written agreements should clearly define compliance responsibilities. Non-compliance can result in fines, stop-work orders, and increased liability exposure.

What Happens If Traffic Control Is Not Implemented Properly?

Projects can be shut down immediately by the permitting authority or law enforcement. Beyond the operational disruption, improper traffic control creates direct liability exposure for injuries or property damage that occur in the work zone. Penalties vary by jurisdiction but can include fines, permit revocation, and civil liability.

How Are Emergency Situations Handled?

In an emergency, such as a downed power line, gas leak, or water main break, traffic control must be established before repair work begins, not after. Certified crews deploy immediately, 24/7, to secure the work zone, establish safe traffic conditions, and coordinate with first responders as needed. Learn more about our emergency response services here.

What Is the Difference Between a Flagger & a Traffic Control Officer?

A flagger is a certified worker who uses a STOP/SLOW paddle or flag to manually direct traffic through or around a work zone. A traffic control officer is typically a uniformed law enforcement officer or authorized municipal official with the legal authority to supersede normal traffic signals and signage. Flaggers are the most common form of active traffic control on work zone projects; officers are typically used for high-volume intersections, special events, or situations requiring legal enforcement authority.

How Much Does Traffic Control Cost?

Traffic control costs vary based on project duration, location, number of personnel required, equipment needed, and permit fees. A single-day flagging operation on a low-volume road will cost significantly less than a multi-week lane closure on a state highway requiring an arrow board, multiple flaggers, and a DOT-approved MOT. The best way to get an accurate estimate is to provide project details — scope, location, duration, and road classification — to a traffic control provider for a formal quote.

Do I Need Traffic Control for A One-Day Job?

Yes, if the work disrupts traffic flow or places workers near active vehicles, a one-day job still requires traffic control. Duration does not affect the requirement — roadway hazard does. A same-day utility repair on a busy road may require the same level of protection as a week-long project.

What Should I Look for In a Traffic Control Company?

The right provider reduces compliance risk, speeds up permit approvals, and keeps projects on schedule. Key factors to evaluate:

  • Do they employ certified flaggers (ATSSA or state-equivalent certification)?
  • Do they have experience with state and local regulations?
  • Is there in-house Maintenance of Traffic and Traffic Control Plan development and permitting support?
  • Do they have a proven 24/7 emergency response capability?
  • Have they established relationships with local permitting authorities?
  • Do they have a documented safety record?