GuardTrailsMethod
The method
How the engine reasons: the in-depth studies, for travellers and for agencies, and the notions they define.
These studies rest on field observations on our own trips, research into how the industry builds its itineraries, and an engine built and tested on more than forty simulated circuits.
Each starts from a finding on the ground, counted rather than told. Each says what it does not know. And when a measurement contradicted us, the correction is published.
The thresholds quoted are parameters of the engine, set per traveller, not rules: yours may sit elsewhere, and the engine takes it into account.
- Tour operator, AI assistant or engineWhat an operator and an AI assistant both lack is not a better answer: it is a method.
- Eleven hotels in twenty nightsDifferent operators, four continents, the same reflex: a different bed every day and a half.
- It isn't the north you're looking forEscaping heat is not a matter of latitude, it is a matter of ceiling.
- Where to put the day with no planIn the middle of the trip, never at the end — and never two in a row.
- How to check an itinerary planned with ChatGPTA place that doesn't exist, a forgotten visa, a new hotel every night. Seven simple checks, from real cases, to verify an itinerary before you go.
- Six guardrails around a language modelWe built an itinerary engine around a language model: the six problems we met in 2026, and the guardrail we set for each, from distance to number of nights.
- Before asking an AI for an itinerary: the questions to ask yourselfAn assistant answers what it is asked. Seven questions to ask yourself first — suitcase, heat, trade-offs — and a template request to copy.
- How many hotels for a road trip?There is no right number of hotels: there is the number of times you accept to unpack your suitcase. How to find yours, and what the quotation does not count.
- Is your itinerary too packed?Four counts the quotation does not show: nights per zone, stops that look alike, full days in a row, share of culture. Do them before you sign.
- What is your heat ceiling?Escaping the heat is not a matter of region: it is the temperature beyond which your day stops. How to find yours, and how to read it in a table.
- Rain days or rain hours?A rain day can be a single forty-minute shower. What counts is the rain that falls during your activity day: how to read it.
- How long does a tour skeleton take by hand?Tasks per stage, leg, day and activity for an 8-day tour, what gets skipped when time runs short, and our current time benchmark.
- The cost of not checking: a night in Afghanistan on a Tajik tourOn 16 September 2026, one geographic-consistency rule on 41 itineraries: 3 real defects, 0 false positives. How to check travel advice stage by stage.
- How to check a tour itinerary: eight checks for a serious reviewFor professionals: eight checks to run on a tour before selling it, from geography to repetition. Travellers have a separate study.
- A tour is not a list of places: shape, rhythm, nights per stageWhat makes a tour: a shape, a rhythm, nights per stage. What a list of places does not tell you, and how to see it before you sell.
- Reading a feasibility check: one grade, six dimensions, assumptions to confirmWhat a tour check report contains (grade A to D, six dimensions, gap to the market, assumptions) and how to use it.
- Your tour is overloaded: what the corrected variant proposesThe engine takes a tour you supply, keeps your stages and your order, and lists each gap with its values before and after.
Defined notions
- Base-change toleranceHow many times a traveller accepts unpacking their suitcase.
- Day with no planA day with nothing to tick off, placed in the middle of a trip and never at the end.
- Rain hoursThe number of hours of rain during the active day — not the number of rainy days.
- Register saturationThe unrequested repetition of one kind of experience.
- Stage or lodgingThe distinction between the zone you visit and the place you sleep.
- Temperature ceilingThe maximum temperature beyond which a day of travel stops working.