Common gaps that inspectors notice immediately.
A Temporary Traffic Control (TTC) plan is much more than a project requirement. It’s the blueprint for creating a safe, efficient work zone that protects workers, motorists, cyclists, and pedestrians. When a traffic control plan is well thought out and properly executed, projects move more smoothly, inspections are easier, and crews have a clear understanding of what is expected.
Unfortunately, many temporary traffic control plans look good on paper but don’t reflect what’s happening in the field.
Inspectors routinely encounter the same issues on work zones across the country. Most aren’t major violations. They’re usually small oversights that can add up to safety concerns, failed inspections, project delays, or unnecessary liability.
The good news? Nearly all of these issues are preventable.
1. The Work Zone Doesn’t Match the Approved Traffic Control Plan
One of the first things an inspector notices is whether the field setup matches the approved temporary traffic control plan.
As projects evolve, crews often expand the work area, move equipment, adjust lane closures, or change traffic patterns to accommodate the day’s work. While these changes may seem minor, they can quickly create a work zone that no longer complies with the approved plan.
Before work begins each day, compare the actual setup to the approved plan. If conditions require changes, update the plan and obtain the appropriate approvals before moving forward.
2. Traffic Control Signs Are Missing or Improperly Placed
Proper signage is one of the most important elements of work zone safety. Drivers depend on advance warning signs to understand what’s ahead and react safely.
Inspectors commonly find:
- Missing advance warning signs
- Incorrect spacing between signs
- Signs hidden by equipment, vegetation, or parked vehicles
- Damaged or difficult-to-read signs
- Old or conflicting signs that were never removed
Even one improperly placed sign can reduce driver confidence and increase the potential for crashes.
3. Traffic Control Devices Aren’t Maintained Throughout the Day
Installing cones, drums, barricades, and other temporary traffic control devices is only the beginning.
Throughout the workday, devices get moved by traffic, weather, construction equipment, or even curious motorists. A work zone that was compliant during the morning setup may look very different just a few hours later.
The most successful crews perform periodic walkthroughs to ensure devices remain where they belong and continue to guide traffic safely.
4. Communication Breaks Down Between Crews
Temporary traffic control is constantly changing as construction progresses.
When supervisors, subcontractors, flaggers, and equipment operators aren’t communicating, unintended lane closures or unsafe work practices can develop quickly.
A brief pre-shift meeting and ongoing communication throughout the day can prevent many common issues before they become inspection findings.
5. MUTCD Compliance Is Viewed as a One-Time Task
Meeting MUTCD compliance isn’t something that happens only during setup.
The Manual on Uniform Traffic Control Devices provides the framework for maintaining safe and consistent work zones throughout the life of the project. Compliance requires continuous attention as conditions change.
The best contractors don’t simply “set it and forget it.” They regularly evaluate traffic flow, visibility, and work zone conditions to make adjustments when needed.
A Quick Work Zone Inspection Checklist
Before an inspector arrives, ask yourself:
- Does today’s work zone match the approved Temporary Traffic Control Plan?
- Are all required warning signs installed correctly?
- Are cones, drums, barricades, and channelizing devices still in their proper locations?
- Is the work zone clear and easy for drivers to understand?
- Have changes been communicated to the entire crew?
- Would you feel comfortable driving through this work zone yourself?
Build a Safer Work Zone with SPI
Whether you’re preparing for a DOT project, supporting a utility crew, or managing multiple job sites, having the right equipment and the right guidance makes a difference. Download the Work Zone, Traffic Safety Equipment Guide.
SPI supplies contractors, municipalities, utility companies, and public works departments with high-quality temporary traffic control signs, channelizing devices, barricades, cones, drums, flagging equipment, and work zone safety products designed to help keep crews safe and projects moving.