--- title: Bike helmets and roads — a lesson of Mova's school · trees and pragmatics description: «Bike helmets and roads», a lesson of the medicine course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: A helmet only works on your head, level, about two fingers above your eyebrows, buckled with room for about one finger under the strap; pushed bac --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/) / Bike helmets and roads # Bike helmets and roads Lesson 72 of the medicine course of Mova's primary school: 15 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/medicine/72-bike-helmets-and-roads/). - [1](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/1/) — A helmet only works on your head, level, about two fingers above your eyebrows, buckled with room for about one finger under the strap; pushed back like a halo it leaves the forehead bare, and unbuckled it flies off before you land. - [2](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/2/) — Helmet foam is made to crush once, so after a crash you get a new one even if it looks fine; a bad head injury can change a life for good, and some children are killed on bikes every year on UK roads. - [3](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/3/) — Roads need more than balance: lights after dark, ears free of music, never riding out between parked cars, never riding up beside a lorry, and brakes checked before every ride; Bikeability training teaches road riding on real roads. - [4](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/4/) — A car at 30 mph needs about 23 m to stop, and a lorry driver sitting high up may not see a child next to the cab at all, so the rider who stays seen and stays back is the one who gets home. - [5](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/5/) — In a fall a helmet's foam crushes and spreads the force so less reaches the skull and brain. - [7](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/7/) — A helmet should sit level, about two fingers' width above the eyebrows, with room for about one finger under the buckled chin strap; pushed back, it leaves the forehead bare, and many falls land on the front of the head. - [8](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/8/) — An unbuckled helmet comes off in a crash before the head hits the ground. - [9](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/9/) — Helmet foam is built for one big hit; after a crash it may be damaged inside even if it looks fine, so it should be replaced. - [10](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/10/) — By law, a bike ridden at night in the UK needs a white front light, a red rear light and a red rear reflector. - [11](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/11/) — Drivers see a small rider in dark clothes very late, especially in rain and at dusk. - [12](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/12/) — Hearing warns you about cars behind you and around corners, so earbuds take away that warning. - [13](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/13/) — The Highway Code gives a stopping distance at 30 mph of about 23 m: about 9 m thinking plus 14 m braking. - [14](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/14/) — Riding out between parked vehicles means drivers can't see you until the last moment. - [16](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/16/) — Bikeability training has 3 levels, from control in the playground to quiet roads to busier roads, and is often done in Year 5 or 6. - [17](https://md.mova.elamur.ai/free/en/corpora/school/medicine/72-bike-helmets-and-roads/17/) — Feet can't stop a bike at speed; brakes, tyres and chain should be checked before every ride, and a bike with a broken brake isn't ridden. - ← previous: [Swimming out too far: sea, rivers, lakes and quarries](https://md.mova.elamur.ai/free/en/corpora/school/medicine/71-swimming-out-too-far-sea-rivers-lakes-and-quarries/) - next →: [Trampolines, playgrounds and skate parks](https://md.mova.elamur.ai/free/en/corpora/school/medicine/73-trampolines-playgrounds-and-skate-parks/) - ↑ back to [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/)