Hidden Challenges of Taxiway Construction: Why Scheduling Matters More Than It Seems
Taxiway construction may look straightforward on a project schedule: close an area, remove pavement, complete underground work, place new pavement, install lighting and markings, and reopen the taxiway.
At an active airport, however, it is rarely that simple.
Taxiway construction takes place inside a highly controlled operational environment where aircraft movements, safety requirements, construction access, utilities, weather, airfield lighting, inspections, and multiple contractors must be coordinated—often within very limited work windows.
For airport owners and contractors, many of the biggest schedule risks are not obvious during early planning. They emerge when construction interfaces with ongoing airport operations.
The result? A seemingly small taxiway project can quickly become a complex scheduling challenge.
1. Construction Must Work Around Airport Operations
Unlike many traditional construction projects, an airport cannot simply shut down the surrounding facility while work takes place.
Aircraft still need to move between gates, runways, maintenance areas, cargo facilities, and other parts of the airport.
Taxiway closures can therefore affect much more than the immediate construction zone. A closure may change aircraft routing, increase congestion elsewhere on the airfield, or require temporary operational procedures.
FAA guidance specifically recognizes construction on movement areas as an operational safety issue requiring coordination, procedures, communication, and continued briefings during construction.
The scheduling challenge
The construction schedule must account for:
Taxiway closure windows
Aircraft operational requirements
Peak traffic periods
Temporary routing
Airport operational restrictions
Construction access
Safety-area restrictions
Required reopening times
This means the contractor's preferred sequence may not always be the sequence the airport can operationally support.
The best construction schedule is therefore not simply the fastest schedule—it is the fastest executable schedule that protects airport operations.
2. Construction Phasing Can Control the Entire Project
On an active airfield, phasing is often one of the most important drivers of project duration.
A taxiway reconstruction project may need to be divided into multiple phases so that portions of the airfield remain operational.
One phase might allow work only during overnight closures. Another may require a temporary taxi route. A third could depend on completion of adjacent work before construction can begin.
The FAA's active guidance on operational safety during airport construction specifically addresses Construction Safety and Phasing Plans (CSPPs) and conditions affecting taxiways and safety areas.
Why this creates hidden schedule risk
Each phase may have its own:
Mobilization
Barricades and safety setup
Temporary markings
Electrical modifications
Inspections
Operational coordination
Closure and reopening requirements
If these transitions are treated merely as milestones rather than actual schedule activities, the baseline schedule may underestimate the time required to move from one phase to another.
3. Underground Utilities Can Become Major Schedule Risks
What lies beneath a taxiway can be just as important as the pavement above it.
Airfield construction may encounter:
Electrical duct banks
Airfield lighting circuits
Communications infrastructure
Drainage systems
Fuel infrastructure
Water lines
Legacy utilities
Abandoned or undocumented facilities
Utility conflicts can interrupt excavation, change work sequencing, require redesign, or create unexpected coordination between contractors.
The challenge becomes even greater when the affected infrastructure supports active airport operations.
Scheduling best practice
Utility investigation should not appear as a single generic activity such as "Utility Work."
A more useful CPM schedule identifies the sequence:
Locate → pothole/verify → excavate → relocate/protect → inspect → backfill → test → release successor work.
This makes potential delay impacts much easier to identify before they affect critical construction activities.
4. Airfield Lighting Is Often More Schedule-Critical Than Expected
Taxiway lighting and electrical systems frequently create complex interfaces between civil and electrical construction.
New pavement may depend on completed electrical infrastructure, while final electrical installation may depend on pavement completion.
The work can involve:
Taxiway edge lights
Centerline lights
Guidance signs
Electrical duct banks
Manholes and handholes
Cable installation
Circuit modifications
Testing and commissioning
These activities often contain dependencies that are underestimated in the baseline schedule.
A project can appear physically complete while still being unable to reopen because testing, lighting, signage, or final operational requirements remain outstanding.
5. Reopening a Taxiway Is Not the Same as Finishing the Pavement
One of the most common scheduling mistakes in airfield construction is treating paving completion as the end of a phase.
It usually is not.
Before a taxiway can return to operation, additional work may include:
Pavement curing
Cleaning and FOD removal
Pavement markings
Lighting restoration
Signage
Electrical testing
Inspection
Removal of barricades
Operational coordination
Final acceptance for reopening
FAA resources for runway and taxiway construction emphasize construction checklists, communication, airport construction notices, and operational coordination as part of keeping projects safe and on track.
A detailed schedule should therefore include operational reopening as a milestone separate from construction completion.
That distinction can be critical.
6. Foreign Object Debris Can Affect Both Safety and Productivity
Foreign Object Debris—or FOD—is a particularly important issue on active airfields.
Loose aggregate, pavement fragments, tools, construction materials, or other debris can create serious hazards to aircraft.
As a result, construction logistics, haul routes, cleaning, inspections, and housekeeping become part of the operational construction process—not simply secondary field activities.
FAA currently maintains specific guidance for airport FOD management, reflecting the importance of controlling debris around aircraft operating environments.
For schedulers, the lesson is straightforward:
Do not assume every available construction hour is a productive construction hour.
Time may also be required for safety setup, inspections, cleaning, escorting vehicles, and restoring areas to operational condition.
7. Night Work Creates a Different Productivity Model
Many taxiway projects rely heavily on nighttime construction because closure opportunities are limited during normal airport operations.
A six-hour closure does not necessarily provide six hours of productive construction.
A typical work window may involve:
Closure → contractor access → safety setup → construction → cleanup → inspection → reopening
If setup and reopening consume significant portions of the available closure, the true production window can be considerably shorter.
Repeating this difference night after night can materially change the project completion date.
For this reason, airport schedules should be built around realistic work windows, not simply calendar duration.
8. Weather Can Affect More Than Paving
Weather risk in taxiway construction is frequently associated with asphalt or concrete placement, but its schedule impact can extend much further.
Rain, extreme temperatures, wind, or other conditions may affect:
Earthwork
Subgrade preparation
Concrete placement
Asphalt paving
Joint sealing
Striping
Electrical work
Testing
Cure periods
More importantly, weather delays can cause a project to miss a specific operational closure window.
Missing one window may push work into another night—or potentially another phase.
Therefore, the schedule impact of one lost workday is not always one calendar day.
9. Multiple Airport Projects Can Compete for the Same Space
Large airports frequently have several capital projects underway simultaneously.
A taxiway project may interact with:
Terminal construction
Apron rehabilitation
Utility projects
Runway work
Airfield lighting upgrades
Roadway construction
Other taxiway improvements
These projects may compete for haul routes, staging areas, closures, escorts, access gates, inspectors, or operational windows.
FAA consultant guidance specifically identifies construction phasing that accounts for other airport construction projects and seeks to minimize interference with airport operations.
An individual contractor's schedule may therefore look achievable when analyzed alone but become unrealistic when viewed within the airport's overall capital program.
This is where program-level scheduling becomes particularly important.
10. Small Changes Can Have Large Schedule Consequences
On an active taxiway, a relatively small design or field change can have consequences far beyond the direct quantity of work.
For example, relocating a duct bank could affect:
Electrical installation → excavation → subgrade → paving → striping → testing → reopening.
The direct work may be relatively minor.
The schedule consequence may not be.
This is why accurate logic, contemporaneous schedule updates, and disciplined delay analysis are essential in airport construction.
How Can Airport Owners Reduce Taxiway Construction Schedule Risk?
The most effective approach is to integrate operations, construction, safety, and scheduling from the beginning of the project.
A strong taxiway construction schedule should:
Reflect actual airport operating restrictions.
Model every construction phase separately.
Include closure, setup, inspection, and reopening activities.
Identify utility and electrical interfaces.
Use realistic nightly or restricted work windows.
Include testing and commissioning—not just physical construction.
Coordinate with adjacent airport projects.
Clearly identify critical and near-critical activities.
Track schedule changes throughout construction.
Evaluate delays based on CPM logic rather than activity percentage alone.
Why Specialized Aviation Scheduling Matters
Airfield construction schedules require more than knowledge of CPM scheduling software.
They require an understanding of how construction sequencing interacts with airport operations.
A schedule can be technically correct and still be operationally unrealistic.
For airport owners, program managers, and contractors, an experienced aviation scheduler can help identify these conflicts before they become field delays.
At UM Planners (UMP), we support aviation construction teams with project scheduling and controls services designed for complex, operational airport environments.
Our services include:
Baseline Schedule Development and Review
Primavera P6 Scheduling
Monthly Schedule Updates
Construction Phasing Analysis
Critical Path Analysis
Time Impact Analysis (TIA)
Delay and Schedule Risk Analysis
Program-Level Schedule Coordination
Planning a Taxiway or Airfield Construction Project?
Early schedule review can uncover operational constraints, phasing conflicts, and hidden dependencies before they become costly construction delays.
Contact UMP to discuss scheduling support for your airport construction program.
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