Why Do Autistic People Like Trains? What Research Says About Special Interests

Written by Dror Arbel, a parent, not a clinician. Last updated October 2026.

Trains as an Autistic Special Interest

Restricted, intense interests are one of the DSM-5 criteria for autism: interests that are unusually strong in focus or intensity. Autistic people often call them “special interests”. They can be anything (dinosaurs, maps, a TV series, weather, computers), but vehicles and transport systems such as trains, buses and elevators come up very often, especially in autistic children.

Many autistic adults keep at least one special interest for life. In a Dutch study of autistic adults, about two-thirds reported having one (Grove et al., 2018).

Why Trains? 6 Likely Reasons

Nobody has proven a single reason, and every person is different. These are the explanations autistic people and researchers most often give:

• Predictability. Trains run on fixed tracks, on set routes and timetables. For someone who finds an unpredictable world tiring, that order can feel calming.
• A system to master. Lines, stations, engine classes, signals and timetables form a huge rule-based system. Researchers such as Simon Baron-Cohen have suggested that many autistic people have a strong drive to understand systems (“systemizing”), and railways are a near-perfect one.
• Repetitive motion and sound. Turning wheels, carriages passing in a line, the rhythm of the rails: these can be very satisfying sensory experiences, similar to stimming.
• Collecting and lining up. Toy trains are easy to sort, line up and connect in sequence, which many autistic children enjoy.
• Faces and characters without social pressure. Shows like Thomas & Friends put clear, exaggerated faces on engines, with simple stories and predictable episodes. Some parents and writers suggest this makes emotions easier to read, though this has not been tested well.
• A way to connect. Train fans have clubs, museums, model railways and online communities, so the interest can become a bridge to other people.

What Does the Research Say?

• Trains capture attention strongly. In a 2021 study of 84 children aged 6–14, trains grabbed attention at least as strongly as faces, in both autistic and non-autistic children, and children rated trains as happier and more exciting (Scheerer et al., 2021, PLoS ONE). So the pull of trains is not unique to autism; autistic children may simply follow it more intensely.
• Special interests can support wellbeing. In autistic adults, being highly motivated by a special interest was linked to higher wellbeing and more satisfaction with social contact and leisure. Very high intensity of engagement, though, was linked to lower wellbeing (Grove et al., 2018, Autism Research).
• Interests can be used in learning. Teachers and therapists often build lessons around a child’s favorite topic (counting carriages, reading timetables, writing about trains) to raise motivation.

Does Loving Trains Mean a Child Is Autistic?

No. Many non-autistic children go through a train phase. What clinicians look at is the bigger picture: how intense and narrow the interest is, whether the child plays with trains in varied, pretend ways or mostly lines them up and watches the wheels, and whether there are also differences in social communication. If you have concerns about a young child, see our M-CHAT-R toddler screener and talk to your pediatrician.

How to Support a Train-Loving Autistic Child

• Join in. Ask them to teach you about their favorite engine or line. Shared interest is one of the easiest ways to connect.
• Use it to teach. Count wagons, read signs and timetables, plan a real trip together, or use train-themed social stories.
• Plan real rides with care. Stations can be loud and crowded. Go at quiet times, bring ear defenders, and use a visual schedule for the trip.
• Let it be a calming tool. A train video or toy can help some children wind down after school or during a hard moment.
• Use it as a bridge. Train museums, model railway clubs and heritage railways are good places to meet people with the same interest.

When Does an Interest Become a Problem?

The interest itself is not the problem. It may be worth talking to a professional (for example an occupational therapist or psychologist) if:

• the child is so distressed when they cannot engage with trains that daily life (school, meals, sleep) keeps breaking down;
• the interest leads to unsafe behavior, such as wandering toward railway tracks;
• it has completely replaced eating, sleeping or any other activity for a long time.

Even then, the usual approach is to work with the interest, adding structure and other activities, not to take it away. Children who wander may also need safety planning, such as door alarms and a GPS tracker.

Frequently Asked Questions

Why do autistic people like trains?

Trains are predictable, rule-based systems with lots of details to learn, and they offer repetitive sights and sounds that many autistic people enjoy. Not every autistic person likes trains, but they are a common special interest.

Is liking trains a sign of autism?

Not on its own. Many non-autistic children love trains. Clinicians look at how intense and narrow an interest is together with differences in social communication and other behaviors.

Why do autistic kids line up toy trains?

Lining things up creates order and a predictable pattern, which many autistic children find satisfying and calming. It is a common form of play for them and is not harmful.

Should I limit my autistic child’s train obsession?

Usually it is better to use the interest than to limit it: join in, use it for learning and connection, and gently add structure around it. Seek advice if it is causing serious distress or safety risks.

Why do autistic children like Thomas the Tank Engine?

Thomas combines trains with clear facial expressions, simple stories and very predictable episodes. Many parents feel this makes the show easy and comfortable to follow, although there is little formal research on it.

Sources

• Scheerer NE, Birmingham E, Boucher TQ, Iarocci G. Attention capture by trains and faces in children with and without autism spectrum disorder. PLoS ONE. 2021;16(6):e0250763. doi:10.1371/journal.pone.0250763
• Grove R, Hoekstra RA, Wierda M, Begeer S. Special interests and subjective wellbeing in autistic adults. Autism Research. 2018;11(5):766–775. doi:10.1002/aur.1931
• American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, 5th ed., text revision (DSM-5-TR), 2022.