--- title: "You have to leave your vehicle parked on a ro… | Theory Test" description: "You have to leave your vehicle parked on a road and unattended. When are you permitted to leave the engine running? The correct answer is “Never if you are aw" lang: en json-ld: | [ { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://fasttrackdrivinglessons.co.uk/#organization", "name": "Fast Track Driving Lessons", "url": "https://fasttrackdrivinglessons.co.uk/", "email": "info@fasttrackdrivinglessons.co.uk", "areaServed": "GB", "description": "Intensive driving courses and driving lessons across the UK with DVSA-approved instructors." }, { "@type": "WebSite", "@id": "https://fasttrackdrivinglessons.co.uk/#website", "url": "https://fasttrackdrivinglessons.co.uk/", "name": "Fast Track Driving Lessons", "publisher": { "@id": "https://fasttrackdrivinglessons.co.uk/#organization" }, "potentialAction": { "@type": "SearchAction", "target": { "@type": "EntryPoint", "urlTemplate": "https://fasttrackdrivinglessons.co.uk/search?q={search_term_string}" }, "query-input": "required name=search_term_string" } } ] }, { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "You have to leave your vehicle parked on a road and unattended. When are you permitted to leave the engine running?", "text": "You have to leave your vehicle parked on a road and unattended. When are you permitted to leave the engine running?", "answerCount": 1, "acceptedAnswer": { "@type": "Answer", "text": "Never if you are away from the vehicle. You must switch off the engine whenever you leave your vehicle unattended on a road. Leaving the engine running wastes fuel, increases harmful emissions, and creates a serious security risk by making the vehicle easy to steal. The Highway Code states that you must turn off the engine and apply the handbrake before leaving the vehicle. This law applies at all times, regardless of your battery level, the road's speed limit, or how briefly you step away." }, "suggestedAnswer": [ { "@type": "Answer", "text": "If you'll be away for less than 5 minutes" }, { "@type": "Answer", "text": "If you are parked on a 20mph street" }, { "@type": "Answer", "text": "If your battery is likely to go flat" } ] } } ] --- Get an exclusive 15% off - Offer ends next week! 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DVSA-style practice question · Safety and your Vehicle ## The answer options - If you'll be away for less than 5 minutes - If you are parked on a 20mph street - If your battery is likely to go flat - Never if you are away from the vehicle**Correct** ## Why that is the answer You must switch off the engine whenever you leave your vehicle unattended on a road. Leaving the engine running wastes fuel, increases harmful emissions, and creates a serious security risk by making the vehicle easy to steal. The Highway Code states that you must turn off the engine and apply the handbrake before leaving the vehicle. This law applies at all times, regardless of your battery level, the road's speed limit, or how briefly you step away. ## How this comes up in the real test Questions from safety and your vehicle appear throughout the 50-question multiple-choice section, and the wording changes between versions. Learn the rule rather than the sentence: the DVSA can ask the same point from the opposite direction, and a memorised answer falls over the moment the phrasing moves. The pass mark is 43 out of 50, so seven wrong answers is your entire margin. If a whole category is shaky, run the topic practice below until you are getting every question right for the right reason, then go back to full mocks under the clock. [Practise Safety and your Vehicle](/theory/quiz/safety-vehicle)[Sit a full mock test](/theory/mock-test) ## More safety and your vehicle questions - [A vehicle MOT test will include an exhaust emissions test. 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