{"id":2503,"date":"2017-12-11T06:00:26","date_gmt":"2017-12-10T19:00:26","guid":{"rendered":"http:\/\/www.driverknowledgetests.com\/resources\/?p=2503"},"modified":"2022-06-23T10:17:35","modified_gmt":"2022-06-23T00:17:35","slug":"how-does-being-tired-affect-your-driving","status":"publish","type":"post","link":"https:\/\/www.driverknowledgetests.com\/resources\/how-does-being-tired-affect-your-driving\/","title":{"rendered":"How does being tired affect your driving?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">We have a sleep\/wake cycle that affects how tired we are. We can fight this cycle, but only for so long: eventually, our body&#8217;s requirement for sleep will be too strong and we will fall asleep. If this happens while you are driving then the results can be quite disastrous.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How does lack of sleep affect your driving?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lack of sleep causes a driver to:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Vary their driving speed, gradually slowing down then realising, so they speed back up again, then repeating that cycle.<\/li><li>Vary their lane position, finding it hard to follow a straight line within the lane, often being warned about crossing the lane lines by running over <a href=\"\/\/www.driverknowledgetests.com\/resources\/what-are-raised-profile-line-markings-or-rumble-strips\/\">lane markings<\/a> or <a href=\"\/\/www.driverknowledgetests.com\/resources\/cats-eyes-retro-reflective-pavement-markers-and-other-road-markings\/\">cats&#8217; eyes<\/a>.<\/li><li>Have a slow reaction time to hazards, often having to brake late because they didn&#8217;t notice a sharp corner or a vehicle ahead that had slowed down.<\/li><li>Miss hazards due to a reduction in the ability to perceive what a hazard is.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">When you&#8217;ve been awake 17-19 hours, it has the same effect on your driving as having a blood alcohol content (BAC) of around 0.05%, which is the same as the legal limit. When you&#8217;ve been awake for more than 24 hours it&#8217;s the same as having a BAC of around 0.1% or twice the legal limit. Bear in mind that losing sleep over a long period of time can cause a sleep debt which can have the same effect.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What&#8217;s a sleep debt?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you consistently get less than the amount of sleep you need, you&#8217;ll build up a sleep debt and this can be caused by:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>A partial reduction in sleep time, e.g. you were disturbed during the night, or you went to bed late but had to get up early<\/li><li>A chronic reduction in sleep time, e.g. you have to shorten your sleep hours on a repeated basis<\/li><li>A total elimination of sleep, e.g. you don&#8217;t get any sleep during the night due to insomnia, or you were kept awake on a long flight<\/li><li>Sleep fragmentation, e.g. you have a new baby, your partner snores, etc<\/li><li>Circadian disruption, e.g. you have sleep apnoea, you do shift work, you have jetlag, etc<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The majority of people need 7-8 hours&#8217; sleep, but a reduction in sleep can affect different people in different ways. For example, a 1-hour reduction of sleep for one person might be the equivalent of a 2-hour sleep reduction for another person.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What causes sleep?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There are three components to sleep.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>The <strong>homeostatic<\/strong> component is your internal drive to go to sleep. From the moment you wake up, the homeostatic component builds until you go to sleep again.<\/li><li>The <strong>circadian<\/strong> component is the biological rhythm which, twice a day (between about 1-6am and 2-4pm) makes your body tired and more prone to sleep. It&#8217;s best not to drive during these times, if possible.<\/li><li>The <strong>arousal<\/strong> component consists of stimulation that reduces your sleepiness.<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Arousal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Things that influence sleep arousal are:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Movement, e.g. changing driving position<\/li><li>Mental stimulation, e.g. listening to a podcast<\/li><li>Chemical stimulation, e.g. caffeine, cocaine (note: you shouldn&#8217;t be using cocaine and driving)<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Arousal effects don&#8217;t last very long and do nothing to change the underlying requirement to sleep. The only way is to actually get some sleep.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are sleepy and you need to reduce your sleepiness, a nap of 20 minutes is the best option. Much more than this and you&#8217;ll feel groggy when you wake up. The least effective measures are opening the window, singing, listening to music, energy drinks and talking to a passenger.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How many crashes are caused by sleepiness?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">According to a study by the Centre for Accident Research &amp; Road Safety at the Queensland University of Technology, 57% of drivers drive when sleepy, 73% of drivers continue to drive once aware of their increasing levels of sleepiness, and drivers under 25 are over-represented in sleep-related crashes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A study by AAA Foundation in America found that 21% of all fatal vehicle accidents involved a fatigued driver.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There&#8217;s more risk of being in a sleep-related crash if you are driving between 1-6am and 2-4pm, you do shift work, you have unrealistic work schedules and you&#8217;re in poor health. Fatigue is a particular problem for long-distance truck drivers who drive at night to avoid traffic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When you are fighting sleep your body starts to take microsleeps where it shuts down for a few seconds at a time. Ignore these and your body will enter into proper sleep.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Signs of sleepiness<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you notice any of these then you should start to think about pulling over and having a short nap.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Increased blinking<\/li><li>Lack of concentration<\/li><li>Increased frequency of changing your posture (obviously excluding other causes like that you have cramp)<\/li><li>Your head is nodding<\/li><li>Yawning<\/li><li>Rubbing your eyes<\/li><li>Drifting within your lane<\/li><li>Difficulty keeping your eyes in focus<\/li><li>Irritability<\/li><li>Difficulty maintaining the same speed<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Find out <a href=\"https:\/\/www.drivingtests.co.nz\/course\/fatigue-management-course\/\">more causes and symptoms of fatigue<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We have a sleep\/wake cycle that affects how tired we are. We can fight this cycle, but only for so long: eventually, our body&#8217;s requirement for sleep will be too strong and we will fall asleep. If this happens while<span class=\"ellipsis\">&hellip;<\/span><\/p>\n<div class=\"read-more\"><a href=\"https:\/\/www.driverknowledgetests.com\/resources\/how-does-being-tired-affect-your-driving\/\">Read more &#8250;<\/a><\/div>\n<p><!-- end of .read-more --><\/p>\n","protected":false},"author":1,"featured_media":2504,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[3],"tags":[205],"class_list":["post-2503","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-advice","tag-fatigue-management"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How does being tired affect your driving? - Driver Knowledge Test (DKT) Resources<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.driverknowledgetests.com\/resources\/how-does-being-tired-affect-your-driving\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How does being tired affect your driving? - Driver Knowledge Test (DKT) Resources\" \/>\n<meta property=\"og:description\" content=\"We have a sleep\/wake cycle that affects how tired we are. We can fight this cycle, but only for so long: eventually, our body&#8217;s requirement for sleep will be too strong and we will fall asleep. If this happens while&hellip;Read more &#8250;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.driverknowledgetests.com\/resources\/how-does-being-tired-affect-your-driving\/\" \/>\n<meta property=\"og:site_name\" content=\"Driver Knowledge Test (DKT) Resources\" \/>\n<meta property=\"article:published_time\" content=\"2017-12-10T19:00:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-06-23T00:17:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.driverknowledgetests.com\/resources\/wp-content\/uploads\/2017\/11\/dog-in-sidecar.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1081\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Darren Cottingham\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Darren Cottingham\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/how-does-being-tired-affect-your-driving\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/how-does-being-tired-affect-your-driving\\\/\"},\"author\":{\"name\":\"Darren Cottingham\",\"@id\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/#\\\/schema\\\/person\\\/9ef16d1448c325b8672efd954b0d10cd\"},\"headline\":\"How does being tired affect your driving?\",\"datePublished\":\"2017-12-10T19:00:26+00:00\",\"dateModified\":\"2022-06-23T00:17:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/how-does-being-tired-affect-your-driving\\\/\"},\"wordCount\":845,\"publisher\":{\"@id\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/how-does-being-tired-affect-your-driving\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/wp-content\\\/uploads\\\/2017\\\/11\\\/dog-in-sidecar.jpg\",\"keywords\":[\"fatigue management\"],\"articleSection\":[\"Advice\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/how-does-being-tired-affect-your-driving\\\/\",\"url\":\"https:\\\/\\\/www.driverknowledgetests.com\\\/resources\\\/how-does-being-tired-affect-your-driving\\\/\",\"name\":\"How does being tired affect your driving? 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