Published to whom

A songthaew is a pickup with two benches in the back, and outside Bangkok it is a large part of how people actually get anywhere.

It has a legally fixed fare. That surprised me, and it may surprise you, because the experience of using one does not feel like the experience of a regulated service. There is usually no printed fare, no meter, no ticket and no timetable. There is a price the driver says.

I set out to write that this was a market with no published price, and the research says otherwise, so this article says otherwise.

What it actually is, legally

Songthaews are not an informal trade. They are route-licensed public buses — in the Department of Land Transport’s classification, หมวด 4, the category covering main and branch routes running out to villages and communities, which expressly includes small buses in sois and songthaews. In Bangkok they sit in the same category; in cities they may be หมวด 1.

Category 2 is Bangkok to the provinces. Category 3 is province to province. Those are the coaches, and they are the ones whose fares make the news.

So the vehicle with no printed fare is, in law, a scheduled bus on a licensed route.

And the fare is set by a board

On 30 March 2026 the Central Land Transport Control Board resolved to raise fares, with effect from 6 April 2026. The Department’s own spokesman set out the numbers. Read the Department’s statement.

For intercity categories 2 and 3: large buses up 5 satang per kilometre per seat — five baht on a hundred-kilometre trip — and vans and minibuses up 2 satang per kilometre per seat.

For category 4 in Bangkok, which is the songthaews: up ฿1 per seat for vehicles less than two years old, and ฿2 per seat for vehicles older than that.

Those are national decisions, taken once, announced once, reported everywhere.

And then the sentence this article exists for:

For categories 1 and 4 in the provinces, setting the fare is the power of the Provincial Land Transport Control Board, with each province to consider the increase using a formula referencing the real cost structure.

Seventy-six times over, every month

Read what that devolution means in practice.

The fare for a provincial songthaew is genuinely set, by a statutory body, against a formula. The formula references the consumer price index, an energy index, and labour costs. And the Department was explicit that the structure would be updated month by month, moving down as well as up, so that it tracks the real cost of fuel.

As an exercise in regulatory design that is defensible and arguably rather good. A national flat rate would be wrong in a country where a province of mountains and a province of flat rice land have different costs per kilometre. A fixed annual rate would be wrong when 45% of an operator’s cost is diesel.

As an exercise in telling a passenger what to pay, it produces this: a number set separately in each province, by a different board, revised monthly, against three indices, for a route network that is itself defined route by route.

There is no single answer to “what does a songthaew cost.” There is a different correct answer per province, per route, per month.

And the Act itself says who the number is for. Section 20 of the Land Transport Act gives each provincial board the power, within its province, to set routes, the number of operators and vehicles, and — under sub-section (4) — “the rates of transport charges and other service charges”, taking effect once the Central Board approves them. The section’s last paragraph then lists which of those determinations must be published in the Royal Gazette: routes, operator numbers and vehicle numbers. Not fares. Section 19 does the same for the Central Board: its fare-setting power is sub-section (6), and the paragraph requiring Gazette publication names (2), (3), (4), (8), (9) and (10) — again, not the fares. The statute requires the state to publish the map of the network and leaves the price of using it to be published however the board sees fit, which is the whole finding of this article written into the law in 1979.

Which is where article 80 needs correcting

This site has a structural finding, stated seven times, that informal systems work when there is a product standard and a published price, and harm people when there is neither. Gold is the model: 96.5% purity and one national price revised dozens of times a day, published on every shop wall and every phone.

The songthaew case has a published price and does not work like gold, and I had to sit with that for a while.

The difference is not whether the price is published. It is who it is published to.

A gold price is published to the buyer. It is on the wall before you walk in. You can check it while the transaction is happening, which means the shop cannot be wrong about it in its own favour without you seeing.

A provincial songthaew fare is published to the operator. It reaches the board, the transport office and the licensee. It does not reach the roadside, and the passenger is not in a position to check it at the moment it matters — which is the only moment that counts.

So the finding needs a second clause, and this article is where it gets one. A published price disciplines a transaction only if the weaker party can read it at the point of sale. Published to the seller, it is a tariff. Published to the buyer, it is a check on the seller. The archive has been using one phrase for two different instruments.

Nothing about article 80’s gold case changes. Gold satisfies both readings and always did. What changes is that “published price” stops being a single test and becomes two, and several of this site’s earlier pieces should be re-read with that in mind.

The number was stale the day it started

One detail from the same announcement, because it shows the difficulty is real rather than administrative laziness.

The Central Board’s increase was calculated on a diesel price of ฿38.99 a litre, the price on 30 March 2026, replacing an older base of ฿34.99. By 2 April, three days later and four days before the new fare took effect, diesel was ฿44.24.

The fare that began on 6 April was already behind the cost it was meant to reflect. The Department said as much itself, and said it would have to review again if prices stayed volatile.

That is what a monthly revision cycle is for. It is also why a passenger cannot hold a number in their head: the correct fare is a thing that moves.

And the pressure was not hypothetical. Before the increase, the Department reported that operators had cut services by 20% — which is the other way a fare that lags cost reaches the passenger. You do not pay more. The songthaew does not come.

What a passenger can actually do

Honestly: less than this article would like.

Ask before boarding, which everybody already does, and which is the behaviour the system produces rather than a failure of nerve. Article 115 The polite person finishes last found that the sanction for a norm nobody enforces is that somebody has to object, and that nobody wants to be that person. Here the passenger cannot even establish that there is something to object to.

The provincial transport office holds the number. That is the honest answer and it is not much use at a roadside at six in the morning.

The comparison that makes the point is the one this site already wrote. Article 174 Ten per cent, until the thirtieth dealt with Bangkok rail fares, where the number is contested, argued over in parliament, printed on boards and reported nationally. Same country, same ministry, same year. The difference is not competence. It is that one fare has a constituency that can read it and the other does not.

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Common misconceptions

“Songthaew fares are unregulated.” No. Songthaews are route-licensed public buses, category 4, and their fares are set by a board.

“The driver can charge what he likes.” Not lawfully. The fare is set — by the Central Land Transport Control Board in Bangkok, and by the Provincial Land Transport Control Board elsewhere.

“So I can look up the correct fare.” In practice, usually not. For provincial routes the number is set province by province and revised monthly. This article could not retrieve a current published table for two major provinces, and says so rather than pretending.

“A published price always protects the buyer.” This is the article’s own correction to itself. It protects the buyer only if the buyer can read it at the point of sale.

“Fares only ever go up.” The formula is explicitly two-way and is meant to fall when fuel falls. Whether it has is not established here.