A Highway Truck Stop Lost 38 Percent of Its Night Retail Sales Because Drivers Would Not Get Out of Their Cabs After Eight
Last updated: 7 Sep 2026 | 4 Views |
A true story from a petrol station and truck stop on a north-eastern highway in Thailand
A Highway Truck Stop Lost 38 Percent of Its Night Retail Sales Because Drivers Would Not Get Out of Their Cabs After Eight
When people buy the same fuel but will not leave their cabs, and the lost retail sales are the entire profit of the business
A large petrol station and truck stop on a north-eastern highway saw night-time retail sales fall 38 percent in a year, while fuel volumes did not drop at all. Here is what the owner discovered by standing in his own truck park at nine in the evening, and how the AIROFOG AT35 thermal fogger brought the numbers back within two months.
Surachai, 49, owns a petrol station and truck stop on a main highway to the north-east: about 12 rai, with a truck park, convenience store, coffee shop, a nine-unit food court and large restrooms, open 24 hours.
What puzzled him was that night-time fuel sales had not fallen at all, yet sales at the convenience store, coffee shop and food court between eight in the evening and two in the morning were down 38 percent in a year — with no price increase and no new competitor within ten kilometres.
He stood and watched the truck park at nine in the evening for three consecutive nights, and the pattern was unmistakable: trucks pulled in, drivers got out to fuel, and got straight back in without going near the shops — unlike before, when drivers would get down, rest and eat.
Three nights standing in his own truck park
Surachai says he has owned the business for eleven years and had never once stood in the truck park at nine in the evening, because he came during the day and read the sales reports from home.
On the first night he understood within twenty minutes. His truck park sits at the rear, against the highway drainage ditch, behind a line of mature trees planted as a noise screen — the darkest, dampest corner of the whole property.
He asked a driver who was climbing back into his cab. The driver answered briefly: too many mosquitoes — I got bitten a dozen times just fuelling up; I'll eat at the next station. That phrase, the next station, told Surachai exactly where his customers had gone.
He also found the problem was not the whole property but three specific points: the rear truck park, the walkway from the truck park to the restrooms, and the food court's outdoor seating — which happen to be the three areas every night customer must use.
Why truck stops are the mosquitoes' favourite place on a highway
The municipal officers who helped survey explained that highway service areas usually tick every box for mosquitoes. First is the highway drainage ditch, which typically holds water in sections, particularly where sediment or leaf litter has dammed it.
Second is the line of mature trees planted for noise and shade, which every large station needs — but which becomes the best daytime harbourage on the property and the source of the mosquitoes that emerge at night.
Third is the lighting. A station is brightly lit all night for safety, which draws flying insects directly into the area. The brighter it is, the more they concentrate.
Last is standing water in the working areas: the food court grease trap, uncovered wash-down drums, old tyres stored behind the workshop, air-conditioner condensate trays, and pools on the apron where the surface has settled — collectively a large breeding reservoir in one place.
The number that made the owner act immediately
Surachai went back to his figures and found something that alarmed him: the profit in a modern service station comes mostly not from fuel, whose margin is very thin, but from the retail and food operations.
So a 38 percent fall in night retail translated into a proportionally larger fall in total profit. He calculated the lost profit at roughly 2,900,000 baht in a year — with fuel volumes entirely unchanged.
There was a second-order effect too. Three food court tenants did not renew their leases that year, citing poor night trade, which made the food court look emptier still and made customers even less inclined to stop.
And the cost that worried him most: truck drivers are extremely loyal customers who run the same route every week. Once they switch to another station it becomes their new habit, and they generally do not come back.
What the station did, and the result in two months
Surachai tackled three things at once. First, eliminating breeding sites on the property: sealing the grease trap lid, fitting lids to every wash-down drum, moving old tyres into the store, cleaning the air-conditioner condensate trays, and regrading the settled sections of apron so they drain.
Second, coordinating with the highway district office to have the drainage ditch in front of the station cleared — an area the station cannot manage itself. He says that coordination was far easier than expected once he explained the reason clearly.
Third, the change that shifted the outcome: buying two thermal foggers and setting a daily application between five and six in the evening, concentrating on the three problem points — the truck park, the walkway to the restrooms and the food court's outdoor seating — plus the noise-screen tree line and the boundary.
Within two months, night retail sales between eight in the evening and two in the morning were back to about 92 percent of their previous level, all food court tenants had returned, and two new tenants had applied to join.
What it actually costs
A modern station's profit is in retail, not fuel
Fuel margin is very thin. The real profit comes from the convenience store, coffee shop and food court. So a 38 percent fall in night retail produced a proportionally larger fall in total profit — roughly 2,900,000 baht a year.
Regular customers who form a new habit and never return
Truck drivers run the same route every week and are extremely loyal, but once switching to another station becomes their habit they generally do not come back. Losing them is lost revenue for years, not one season.
Tenants who do not renew, and a self-reinforcing spiral
When three food court tenants left citing poor night trade, the food court looked emptier, which made customers even less inclined to stop — a spiral that becomes harder to break the longer the source is left untreated.
The station's image and highway safety
A truck stop exists so drivers can genuinely rest, which bears directly on road safety. When drivers will not get out and keep driving instead, that is a risk reaching well beyond the sales figures.
Why the usual fixes do not work
Installing electric insect traps around the truck park
They work within a very limited radius and draw insects toward a light source — negligible at a station already brightly lit all night, across 12 rai.
Putting mosquito coils on the food court tables
The smoke and smell interfere with eating and reach only a few metres, and in an open area with wind and vehicle movement the smoke disperses almost immediately. A coil on every table also tells customers directly that this place has a mosquito problem.
Removing the noise-screen trees
This solves one problem and creates another, because the tree line is there to block highway noise and dust, which a rest area needs. The right approach is thinning them and treating them regularly, not removing them.
Contracted spraying once a month
The contractor comes on his own schedule, usually during the day when mosquitoes are sheltering. Monthly is far too infrequent against a species that goes from egg to adult in seven to ten days — the problem returns within a week.
Just keeping the place looking clean
Necessary but not sufficient, because the main breeding sites are out of sight: the grease trap, air-conditioner condensate trays, old tyres behind the workshop, and the highway drainage ditch outside the station's boundary.
Fog daily, before the night customers arrive
Once you know the problem occurs at three specific points and during a specific window, the requirement is very direct: reduce mosquito numbers at those points before the night customers start arriving, which is from about six in the evening.
A thermal fogger is the right tool, because the fog drifts into the noise-screen tree line, the drainage ditch, the shrubbery around the truck park and the dark corners behind the buildings — harbourage that coils and traps can never reach across 12 rai.
The right window is five to six in the evening, two to three hours before the night customers arrive, when the wind is settling so the fog holds over the area longer.
And the machine must belong to the station, because it needs applying daily through the rainy season and a 24-hour operation must control its own timing. That is why Surachai chose the AIROFOG AT35 — station staff can operate it, and the stainless body handles fuel vapour and highway dust.
10 reasons the AIROFOG AT35 thermal fogger solves it
1. Fog reaches the noise-screen trees and the drainage ditch
Mosquitoes at a truck stop rest in the noise-screen tree line, the shrubbery around the truck park, the highway drainage ditch and the dark corners behind the buildings. The AIROFOG AT35 produces a fog that genuinely drifts into all of them — impossible for traps and coils across 12 rai.
2. Covers a large property in well under an hour and a half
A 12-rai station with a truck park, food court and perimeter tree line takes roughly 50 to 70 minutes with the AT35 — short enough to do daily without disrupting a 24-hour operation.
3. A 100 percent stainless steel body that handles fuel vapour and highway dust
Station environments combine fuel vapour, highway dust and humidity, which corrode and clog ordinary equipment quickly. Full stainless construction handles it far better and washes down easily, so the machine lasts for years.
4. Station staff can operate it as a routine task
Stations already have staff on duty around the clock. The AT35 is simple enough to train two or three of them, so fogging becomes a daily task on the afternoon shift like any other cleaning routine, at no additional labour cost.
5. Fog on the schedule the business needs, not a contractor's
The whole solution rests on applying two to three hours before the night customers arrive, which no contractor will supply daily at a fixed hour. Ownership puts both timing and frequency entirely under the station's control.
6. Light enough to cover the whole property including the fence line and ditch
A station combines concrete apron, tree lines, ditch edges and areas behind buildings that no vehicle can reach. The AT35 is light enough for one person to carry throughout, including down beside the ditch.
7. Runs both water-based and oil-based formulations
A station has areas near the food court needing particular care and truck park areas where full-strength treatment is fine. Accepting both formulation types lets you match the product to each zone and rotate through the year to slow resistance.
8. Certified to German and British standards
For stations in major brand networks subject to regular site standards audits, internationally certified equipment is evidence you can present, and shows the station's hygiene measures are systematic.
9. Compliant with Thai government standard equipment specifications
For service stations operated by government agencies, cooperatives or state enterprises procuring under public procurement rules, conformity with the standard equipment schedule makes budgeting and acceptance straightforward.
10. A Thai service centre with genuine parts and 10-plus years of technician experience
A 24-hour station cannot stop fogging through the rainy season, because night sales fall the moment the mosquitoes return. Domestic service and genuine parts mean fast resolution rather than a month waiting on overseas shipment.
Before the thermal fogger
- Night retail sales between eight and two down 38 percent
- Roughly 2,900,000 baht a year in lost profit, with fuel volumes unchanged
- Truck drivers fuelling and leaving without entering the shops
- 3 food court tenants declining to renew
- Breeding sites in the grease trap, old tyres and the drainage ditch
- Eleven years of ownership without ever standing in the truck park at nine in the evening
After the thermal fogger
- Night retail back to about 92 percent of previous levels within two months
- All food court tenants back, plus two new applicants
- Truck drivers getting out and using the food court again
- Grease trap sealed and every on-site breeding source eliminated
- Highway district office cleared the drainage ditch in front of the station
- Daily fogging between five and six in the evening by station staff
The three-step process
1. Stand and watch at the hour your customers actually use the place
The fastest way to find a night business's problem is to stand where the customer stands, at the hour they are actually there, and ask a customer who is leaving. Three nights of that is worth more than a year of sales reports.
2. Eliminate breeding sites both inside and outside the boundary
Inside: seal the grease trap and every wash-down drum, move old tyres under cover, clean the air-conditioner condensate trays, and regrade settled apron so it drains. Outside: coordinate with the highway district office to clear the drainage ditch — generally well received when the reason is explained clearly.
3. Fog daily between five and six, focusing on the three key points
Apply two to three hours before the night customers arrive, concentrating on the truck park, the walkway to the restrooms and the food court's outdoor seating, plus the noise-screen tree line and the boundary. Then measure with night retail sales — the indicator closest to the business.
From someone who uses one
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The breeding sites station teams most often miss
The food court grease trap is the most common and most serious, because it holds still water permanently, carries organic matter that larvae feed on, and often has a poorly seated lid or an unmeshed vent. Make checking the lid a monthly maintenance item.
Old tyres stored behind the workshop are the second, particularly at stations offering tyre or repair services. Tyres stacked outdoors all hold water, and it evaporates very slowly. Move them under cover or sheet them with tightly stretched tarpaulin.
Air-conditioner condensate trays — and a large station has dozens of units — are almost never inspected and hold water constantly through the hot season. Have the maintenance team check them alongside the annual cleaning and again before the rainy season.
The last is pools on the apron where the surface has settled under truck loads. These form gradually enough that nobody notices, until they become permanent pools after rain. Survey the apron after every heavy rainfall and regrade where needed.
Why hourly sales data is the most powerful tool you have
What let Surachai find the problem was that he did not look only at monthly totals. He broke sales down by time band, which showed immediately that the problem was confined to the hours between eight in the evening and two in the morning.
Looking only at the total, he would have seen a modest decline and might have blamed the economy. Broken down by hour, the numbers point at a very specific cause and let you fix it precisely rather than guessing.
The same principle applies to any business trading across multiple time bands: restaurants, hotels, sports venues, shopping centres. Splitting data by hour and by zone regularly reveals problems hiding inside a total that looks normal.
Once you have acted, the same data measures whether it worked — which is what lets you decide quickly whether to increase frequency or shift where the application is focused.
Frequently asked questions
Is fogging safe at a petrol station?
Yes, with the right procedure: do not apply directly around the dispensers or underground tank area. Concentrate on the tree lines, shrubbery, truck park and surrounding areas, notify staff in advance, cover food in the food court during the application, and allow roughly 30 to 60 minutes.
When should we fog?
Between five and six in the evening is best: two to three hours before the night customers arrive, with the wind settling so the fog holds, and at a time when traffic through the forecourt is lighter than the evening rush.
How many machines does a station of my size need?
Up to about 5 rai, one machine is enough. For 8 to 15 rai with a truck park and food court, two, so a full pass finishes within an hour and there is a spare. Stations with widely separated zones should consider three.
How often should we fog?
Daily through the rainy season and on alternate days in the dry. Let night-time retail sales drive the decision — the indicator closest to the business, and one already in your point-of-sale system.
Can station staff operate it?
Yes. Designate two or three responsible operators on the afternoon shift and train them fully on mixing, protective equipment and cleaning the machine after every use — which matters in an environment with highway dust.
What about the highway drainage ditch outside our boundary?
Coordinate with the local highway district office to have the ditch cleared and vegetation cut. This is generally well received once you explain the reason. In the meantime, fogging the fence line on the ditch side reduces the impact.
Does this apply to other kinds of rest areas?
Yes. The same principles apply to bus terminals, freight yards, transport company depots and roadside restaurants with open parking — all of which share the same risk factors: tree lines, ditches and bright lighting all night.
What if the machine fails?
AIROFOG maintains a service centre and genuine parts in Thailand with technicians of more than 10 years' experience, so issues resolve fast. A 24-hour station should keep one spare, because night sales fall immediately once fogging stops in the wet season.
Eleven years without standing where the customer stands
The most direct lesson here is that the numbers in a report tell you there is a problem but never what the problem is — and the answer is usually where the customer stands, at the hour they are actually there, which many owners never visit.
Splitting sales by time band rather than reading the total is an extremely powerful tool that costs nothing, because it points at a specific cause and lets you fix precisely the right thing.
And for a business whose profit sits in retail rather than the headline product, getting customers to leave their vehicles and spend time on your property determines the entire profit of the operation — which sometimes turns on something as small as whether there are mosquitoes.
Talk to the World Health Disinfection team about a mosquito control plan for your station or truck stop — machine selection, chemistry, and a schedule that never disrupts service.
See the machine and pricing — click here
Call 065-556-6294 or add LINE @whd268
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