Every spring, public works crews fill thousands of potholes, and many of those repairs fail within weeks. The cause is rarely effort. It is usually a mismatch between the repair method, the weather, the road and the materials on the truck. FHWA report FHWA-RD-99-168 compared common pothole repair procedures, and cities can use its lessons to choose methods deliberately. This guide shows how a municipal maintenance management system can record the method used on every repair and turn that record into better decisions.
Municipal Pothole Repair / FHWA-RD-99-168 Methods
Match the Repair Method to the Pothole, Then Track What Actually Lasts
Throw-and-roll, spray injection, semi-permanent and full-depth repairs each have a place. A city only learns which one works when the method is recorded on every work order.
Wearing surface
Binder and base
Subgrade and moisture
Four methods, four depths of repair
Why Pothole Repairs Fail: Root Causes Crews See Every Year
Water left in the hole
Moisture weakens the bond between patch material and the surrounding pavement.
Weak edges
Ragged, undercut or crumbling edges let the patch lift and ravel under traffic.
Poor compaction
Loose material migrates under wheel loads and the patch settles or ejects.
Wrong material for the temperature
Cold mix in the wrong conditions or hot mix that cools before placement reduces durability.
Failure of the underlying structure
A surface patch cannot fix a saturated base or alligator cracking beneath it.
The FHWA study is widely cited because it tested several procedures in the field and compared how they performed over time. Published guidance generally favors methods that prepare edges and compact material, while accepting quicker methods when conditions are poor.
- Review the report itself when setting local standards, and confirm its details against your own climate and traffic.
- Treat the methods as a menu, not a single best answer.
- Measure your own results, because local materials and crews matter.
The Four Repair Methods Compared
Method 1
Throw-and-roll
- Place patch mix directly into the hole
- Compact with the wheels of the truck
- Fastest and cheapest per pothole
- Best for winter and emergency response
Method 2
Spray injection
- Blow out debris and water with air
- Spray binder, then inject aggregate and emulsion
- Cover with dry aggregate, with no compaction
- Efficient for crews with the equipment
Method 3
Semi-permanent
- Square the edges and remove loose material
- Clean, tack the sides and fill with mix
- Compact with a roller or plate
- Good balance of cost and durability
Method 4
Full-depth
- Saw-cut and remove failed pavement and base
- Repair or replace the underlying layers
- Place and compact new asphalt in lifts
- Used where the structure itself has failed
Record the Method on Every Pothole Work Order
Capture method, material, crew and conditions from the truck, then compare outcomes by method at the end of the season.
Choosing a Method: A Decision Guide for Crew Leaders
| Condition | Throw-and-Roll | Spray Injection | Semi-Permanent | Full-Depth |
|---|---|---|---|---|
| Cold, wet winter weather | Often the practical choice | Works if the equipment is available | Harder in standing water | Usually deferred |
| Mild, dry spring weather | Use for temporary needs | Strong option | Strong option | Consider for failed areas |
| High-volume arterial road | Temporary only | Consider | Preferred over temporary fixes | For structural failures |
| Low-volume residential street | Acceptable short term | Efficient for many holes | Good value | Only for severe areas |
| Cluster of potholes with cracking | Short-lived | Limited | Individually repaired | Likely best fit |
Questions to ask before the crew starts
- Is the hole isolated, or part of a wider failing area?
- Is water present, and can it be removed?
- Is this a temporary stopgap or a repair expected to last through the season?
- Are hot mix, cold mix or emulsion materials available today?
- Can traffic control be set up safely for the time the method requires?
What Data to Capture on a Pothole Work Order
1
Location and size
Street, nearest address or GPS point, estimated length, width and depth.
Street, nearest address or GPS point, estimated length, width and depth.
2
Method and material
Which of the four methods, product used, quantity and source batch if known.
Which of the four methods, product used, quantity and source batch if known.
3
Conditions
Air temperature, wet or dry surface and whether water was present in the hole.
Air temperature, wet or dry surface and whether water was present in the hole.
4
Crew and time
Crew size, equipment, minutes on site and traffic control used.
Crew size, equipment, minutes on site and traffic control used.
5
Photos
Before and after images, which also support citizen response and claims review.
Before and after images, which also support citizen response and claims review.
Measuring Performance: Repeat Repairs Tell the Real Story
A cheap repair that fails twice is more expensive than a better repair done once. Tracking repeat visits to the same location by method shows which approach is truly cost-effective in your climate.
- Flag any location repaired more than once in a season for engineering review.
- Compare outcomes by crew and material batch to find process issues.
- Use results to adjust your decision guide each year.
Before and After: From Reactive Patching to a Managed Program
Reactive patching
- Method chosen by habit or truck contents
- Complaints logged separately from repairs
- No view of repeat failures by location
- Budget requests rely on anecdotes
Managed repair program
- Method selected using a clear decision guide
- Requests, work orders and costs in one record
- Repeat failures flagged automatically
- Budget requests supported by method and cost data
A Seasonal Pothole Program Calendar
Late winter
Rapid response with temporary methods. Log each one as a candidate for permanent repair later.
Spring
Return to temporary patches and upgrade them as weather allows. Prioritize arterials and bus routes.
Summer
Schedule semi-permanent and full-depth work, and coordinate with resurfacing plans.
Fall
Review repeat repairs, replenish materials and prepare crews, trucks and equipment before freezing weather.
Equipment and Materials Readiness
- Maintain spray injection trucks, compressors, heaters and rollers on a preventive maintenance schedule so they run when potholes peak.
- Track hot mix, cold mix and emulsion inventory with reorder points ahead of the season.
- Record equipment hours and breakdowns to plan replacements before the busy period.
- Store cold mix according to the supplier guidance to avoid hardened or contaminated material.
- Keep signs, cones and arrow boards in a checked state for every crew.
Safety and Traffic Control for Pothole Crews
- Use traffic control plans suited to the road class and speed, following local and national guidance.
- Choose methods with shorter exposure time where traffic risk is high, then plan a follow-up repair.
- Record near misses and incidents in the same system as work orders.
- Provide high-visibility apparel and attenuators where required by policy.
- Review job hazard checklists with crews before each shift.
How Oxmaint Fits the Municipal Pothole Workflow
Oxmaint is a CMMS built around work orders, asset records and reporting. For pothole programs, it gives crews and supervisors a shared record of what was done and where.
Citizen requests and inspectionsWork requests converted to prioritized work orders
Method, material and crew dataCustom fields and mobile forms completed on site
Truck, roller and compressor carePreventive maintenance schedules and meter readings
Patch material stockInventory tracking with reorder alerts
Council and budget reportingDashboards by street, method, cost and response time
Starting Small: A 30-Day Rollout
- Define the four methods as work order types or required fields.
- Build a short mobile form with location, method, material and weather.
- Train one crew first and review their entries after the first week.
- Add before and after photos once the form is used consistently.
- Run a repeat repair report at thirty days and share it with supervisors.
Patch Materials: What to Record and Why It Matters
| Material | Typical Use | Handling Point | Record on the Work Order |
|---|---|---|---|
| Hot mix asphalt | Semi-permanent and full-depth repairs | Must be placed and compacted before it cools | Plant, load time, placement temperature if measured |
| Cold mix asphalt | Throw-and-roll and temporary winter repairs | Storage and product type affect workability | Product name, lot or bag count, storage location |
| Asphalt emulsion and aggregate | Spray injection repairs | Equipment settings and aggregate dryness matter | Emulsion type, aggregate source, quantity used |
| Tack coat | Bonding patch material to the hole sides | Apply evenly and allow it to set as directed | Product, application method and quantity |
Which Potholes First: A Simple Severity Guide
Level
Situation
Response
Urgent
Deep hole in a travel lane on a high-speed road or bus route
Same-day response with the fastest safe method, then schedule a durable repair
High
Large pothole on an arterial or near a school zone or crossing
Repair within days using a method suited to conditions
Routine
Moderate pothole on a residential street
Batch by route and repair with efficient methods
Planned
Clustered potholes with widespread cracking
Refer to the resurfacing or full-depth plan
Common Mistakes in Pothole Programs
- Filling holes full of water or ice and expecting the patch to bond.
- Repeating temporary repairs on the same location instead of escalating to a permanent fix.
- Skipping edge preparation because the crew is behind on the route list.
- Letting cold mix sit in uncovered piles until it hardens or absorbs moisture.
- Recording only the number of potholes filled, not the method or the outcome.
- Running spray injection equipment without preventive maintenance until it fails in peak season.
Handling Citizen Requests and Claims
Residents report potholes by phone, app and email, and some submit damage claims. A single record from request to repair makes responses faster and more consistent.
Report received
Date, location and description logged against a request number.
Date, location and description logged against a request number.
Inspected
Size and severity recorded, with photos if possible.
Size and severity recorded, with photos if possible.
Scheduled
Priority set and the work order assigned to a route or crew.
Priority set and the work order assigned to a route or crew.
Repaired
Method, materials and completion time captured and photographed.
Method, materials and completion time captured and photographed.
Closed
The resident can be updated, and the record supports any claim review.
The resident can be updated, and the record supports any claim review.
Budget Conversations: Use Method Data, Not Anecdotes
- Show the number of repeat repairs by street and method, so councils can see where temporary fixes keep returning.
- Compare labor and material cost for each method alongside how long repairs lasted.
- Identify roads where full-depth repair or resurfacing would end the cycle of patching.
- Report response times by priority to demonstrate service levels.
- Use equipment downtime and repair costs to support replacement requests for aging trucks.
Who Owns Each Part of the Process
Dispatcher
Triages requests, sets priority and assigns work orders by route to reduce travel time.
Crew leader
Selects the method, confirms conditions and ensures edge preparation and compaction are done.
Supervisor
Reviews repeat repairs, coaches crews and adjusts the decision guide based on results.
Fleet mechanic
Keeps patch trucks, rollers and compressors ready through scheduled preventive maintenance.
Cold-Weather Operations: Keeping Winter Repairs Under Control
Winter potholes are the hardest to fix well, yet they generate the most complaints. A clear cold-weather routine helps crews respond quickly without losing track of what needs a better repair later.
- Tag every winter temporary repair so it appears on a spring follow-up list.
- Record air temperature and surface conditions, since they explain many early failures.
- Pre-position cold mix and traffic control supplies at depots near problem corridors.
- Check heaters, hoses and compressors on patch trucks before each cold snap.
- Review route assignments after each freeze-thaw cycle, because new potholes appear in clusters.
Training Crews to Choose Methods Consistently
- Walk crews through the four methods and the decision guide using local photos.
- Agree on minimum steps for each method, such as clearing debris and compacting.
- Use the mobile form so the method choice is recorded before the work begins.
- Hold a short monthly review of repeat repairs and discuss what could have been done differently.
- Update the guide each season when results show a method performing better or worse than expected.
Reports Every Public Works Director Should Be Able to Pull
- Potholes repaired by month, method and crew, with average time on site.
- Repeat repairs within a set period, grouped by street segment and original method.
- Material usage and cost per method compared with the budget for the season.
- Open requests by age and priority, so overdue items are visible to supervisors.
- Patch truck and roller downtime, with repair cost and preventive maintenance compliance.
- Locations flagged for resurfacing or full-depth repair based on repeated patching.
- Crew productivity trends that separate real improvement from seasonal swings in pothole volume.
- Photo-backed records for any location that appears in a claim or council inquiry.
- A year-over-year view of total repairs, so changes in winter severity are not mistaken for program performance.
Frequently Asked Questions
What is FHWA-RD-99-168?
It is an FHWA report on pothole repair materials and procedures. Read the original to confirm details before adopting local standards.
Which repair method lasts longest?
Methods with edge preparation and compaction generally last longer, but results depend on conditions. Track your own data. See a demo.
Is throw-and-roll ever the right choice?
Yes, for winter response and emergencies, when speed matters most. Log it as temporary and schedule a follow-up repair.
How do I measure whether a method works?
Count repeat repairs at the same location, then compare cost per durable repair. Start tracking by method.
Can crews enter data on their phones?
Yes. Mobile work orders let crews record method, materials and photos at the site, even when connectivity is limited.
Turn Every Pothole Repair Into Data You Can Use
Build a repair program around methods that last, with work orders, equipment care and reports in one place.
