Before entering the expressway, checking the tyres' air pressure is enough; there is no need to look at the tread depth.
高速道路に入る前の点検では、タイヤは空気圧だけを確認すればよく、溝の深さまでは見なくてよい。
This statement is FALSE
Explanation
Tread depth is on the checklist along with air pressure. Shallow tread grips poorly in the rain, which is especially dangerous at expressway speeds.
Original text
タイヤの溝の深さが十分であるか。
Source: Rules of the Road — 交通の方法に関する教則 第7章 高速道路での走行 第1節 高速道路に入る前の心得 · National Public Safety Commission Notification No.3
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