Airport construction is among the most change-order-intensive work in the industry. Active runways, FAA safety zones, TSA security requirements, and 24/7 flight operations create conditions where the original construction plan changes constantly. Drivers, contractors, and project teams navigating airport construction sites must understand how these changes occur and how to plan around them.

The U.S. currently has $28.6 billion in active airport construction projects funded through the FAA's Airport Improvement Program (AIP) and the Bipartisan Infrastructure Law. These projects generate change orders at a rate 35-40% higher than comparable non-airport construction, primarily because of operational constraints that do not exist on standard job sites.

This guide explains how drivers can plan for airport construction changes and how the change management process works on federally regulated airport projects.

Why Airport Construction Changes More Than Other Projects

Four factors drive the elevated change rate on airport projects:

1. Active operations cannot stop.

Commercial airports operate 18-24 hours per day. Construction must work around flight schedules, not the other way around. When flight schedules change (airline route adjustments, seasonal traffic shifts, emergency diversions), construction phasing changes with them. A runway paving project scheduled for night shifts may need to shift to daytime if the airport adjusts its runway use pattern.

2. FAA regulations evolve during construction.

Airport construction must comply with FAA Advisory Circulars (AC 150/5370-10 is the primary one for construction safety). Updates to these circulars during a multi-year project can require changes to safety plans, barricade layouts, NOTAM procedures, and equipment staging areas. These are not optional changes.

3. Subsurface conditions are unpredictable.

Airport sites have decades of buried infrastructure: fuel lines, electrical conduits, communication cables, drainage systems, and sometimes abandoned structures from previous terminal configurations. Encountering unknown utilities during excavation triggers change orders for relocation, protection, or rerouting.

4. Security requirements add constraints.

TSA and airport authority security protocols dictate who can access the airfield, what vehicles are allowed, and where construction can stage materials. Security requirements change based on threat levels, VIP movements, and seasonal travel surges. Each change to access or staging creates ripple effects on construction sequencing.

How Airport Construction Phasing Works

Airport projects are divided into phases that align with operational needs. Understanding the phasing system is essential for anyone working on or traveling through an airport under construction.

Phase structure:

Phase Element	What It Controls	How It Changes
Construction Safety and Phasing Plan (CSPP)	Overall safety framework for the project	Updated when scope or schedule changes
Notice to Air Missions (NOTAM)	Alerts to pilots about construction activity	Issued/modified for each phase change
Movement Area closures	Runway/taxiway availability	Changed per FAA and airline coordination
Non-Movement Area restrictions	Terminal, ramp, and roadway impacts	Changed based on construction progress
Vehicle access routes	Approved paths for construction vehicles	Changed when phases shift

For drivers and transportation users:

Airport roadway construction affects terminal access, parking, rental car returns, and rideshare pickup zones. Changes to these areas are phased to maintain minimum traffic flow, but the specific routing changes frequently as construction progresses.

Practical planning steps for drivers:

Check the airport's website 24 hours before travel. Most airports maintain a construction updates page with current road detours and terminal access changes.
Add 15-30 minutes to your arrival time during active construction phases. Detours through construction zones add distance and reduce speed limits.
Follow temporary signage, not GPS. Navigation apps may not reflect temporary road closures or detour routes. Airport construction zones use temporary signage that overrides normal routing.
Expect changes between visits. Airport construction phasing can shift weekly. A route that worked last Tuesday may be closed this Tuesday.
Use public transit or remote parking when available. Terminal-area construction has the most impact on private vehicle traffic. Airport rail connections and remote parking lots with shuttle service are typically less affected.

How Change Orders Work on Airport Projects

Airport construction change orders follow a more complex approval chain than standard commercial construction because of federal funding and FAA oversight.

The approval chain:

Contractor identifies the change. The GC or sub encounters a condition that differs from the contract documents (unforeseen utility, FAA directive change, phasing modification).
GC submits a change order request to the airport authority. The request includes scope description, cost estimate, schedule impact, and justification.
Airport authority reviews and routes. The airport's construction manager evaluates the request. If it involves airfield safety, it goes to the FAA Airport District Office (ADO) for review.
FAA review (if applicable). Changes that affect safety areas, runway/taxiway geometry, or NAVAID facilities require FAA approval. This adds 2-4 weeks to the change order timeline.
Funding source verification. AIP-funded projects must confirm that change order costs remain within the federal grant. Changes exceeding the grant may require a grant amendment, which involves FAA regional office approval.
Approval and execution. The airport authority issues the change order. The GC updates the construction schedule and modifies subcontractor scopes as needed.

Timeline comparison:

Change Order Type	Standard Commercial	Airport (Non-FAA)	Airport (FAA Review)
Simple scope change	1-2 weeks	2-3 weeks	4-6 weeks
Unforeseen condition	2-3 weeks	3-4 weeks	6-8 weeks
Safety-related change	1-2 weeks	2-4 weeks	4-8 weeks
Schedule-impacting change	2-4 weeks	4-6 weeks	8-12 weeks

Federal Funding and Change Order Limitations

AIP-funded airport projects have specific constraints on change orders that do not apply to privately funded construction:

Cost limitations. AIP grants cover eligible project costs. Change orders that increase the project cost beyond the grant amount may not be reimbursable. The airport authority must demonstrate that the change was necessary and could not have been anticipated.

Scope limitations. Changes that alter the fundamental scope of the AIP grant require FAA approval and potentially a grant amendment. Adding a taxiway to a runway rehabilitation project, for example, would require a separate grant application.

Documentation requirements. Federal projects require detailed cost justification for every change order. T&M work must be documented daily with certified payroll. Equipment rates must follow the FAA's approved rate schedule or FHWA equipment rate guidelines.

Audit exposure. AIP-funded change orders are subject to federal audit. The DOT Inspector General and the FAA periodically audit airport construction projects. Change orders without adequate documentation face disallowance, which means the airport authority (and potentially the GC) must repay the federal funds.

Security Clearance Changes During Construction

Airport construction workers need security clearances (SIDA badges for Security Identification Display Areas) to access the airfield. Changes to security requirements create construction impacts:

Badge processing delays. New workers added through change orders need background checks and badge issuance. Processing takes 5-15 business days depending on the airport authority. This means change order work in secured areas cannot start immediately even after the change is approved.

Escort requirements. Uncleared workers in secured areas must be escorted by a badged individual at a ratio of no more than 5:1 at most airports. This creates labor inefficiency on change order work that requires additional crews.

Vehicle inspections. Construction vehicles entering the airfield must be inspected and marked. New vehicles brought in for change order work need separate inspection and approval. Some airports limit the total number of construction vehicles on the airfield at any time.

Impact on retainage and billing. Security-related delays on change order work can extend the project schedule, which affects retainage calculation timelines and progress billing. GCs must document security delays separately to support schedule extension claims.

Planning for Construction Changes: Contractor Perspective

GCs and subcontractors working on airport projects should build change management into their baseline plans:

Budget contingency. Airport projects typically carry 10-15% contingency for change orders, compared to 5-8% on standard commercial work. The elevated contingency reflects the higher probability of operationally driven changes.

Schedule float. Build 15-20% additional float into airport construction schedules. Phase changes driven by airline schedule adjustments often compress or extend individual activities without changing the overall completion date.

Staffing flexibility. Maintain a roster of pre-badged workers who can mobilize quickly when change orders are approved. The badge processing delay makes it impractical to hire new workers for short-duration change order tasks.

Documentation discipline. Photograph and log every existing condition before starting work. Airport subsurface conditions are poorly documented on older facilities, and photographic evidence of pre-existing conditions is essential for change order justification.

Frequently Asked Questions

How far in advance do airports announce construction-related road changes?

Most airports announce major road detours 2-4 weeks in advance through their website and signage. Minor changes (lane shifts, temporary closures for equipment moves) may only have 24-48 hours notice. Subscribe to your airport's construction update notifications if you travel through the airport regularly.

Can a GC refuse a phasing change requested by the airport authority?

Practically, no. The airport authority controls airfield access, and phasing changes driven by operational needs are not negotiable. The GC can submit a change order for the cost and schedule impact of the phasing change, but they cannot refuse to comply with the modified phasing plan.

What percentage of airport construction costs are change orders?

Industry data shows airport construction change orders average 12-18% of the original contract value, compared to 8-12% for standard commercial construction. Complex terminal renovation projects can reach 25%+ due to the interaction between new construction and existing operations.

How do change orders affect the AIP grant amount?

Change orders within the original scope and within a reasonable cost increase (typically up to 15% of the grant amount) are handled through grant amendments. Changes exceeding that threshold or outside the original scope require a new grant application, which can take 6-12 months.

Who pays for changes caused by FAA regulation updates during construction?

Changes required by FAA regulatory updates issued after the contract was bid are typically the airport authority's responsibility, funded through the AIP grant or airport operating funds. The contractor is entitled to a change order for the additional cost and schedule impact.

How should drivers using rideshare services plan for airport construction?

Check the airport's designated rideshare pickup location before your flight lands. Construction frequently moves pickup zones, sometimes to temporary locations outside the terminal area. Most airports update their rideshare pickup information on their website and through coordination with rideshare apps, but app updates may lag behind physical changes by several days.

Airport construction change orders require more documentation and longer approval chains than standard projects. SubcontractorAudit's pay application audit tracks change order costs against retainage balances, manages federal documentation requirements, and keeps your billing aligned with evolving project scopes.