{"id":59609,"date":"2026-01-07T15:10:21","date_gmt":"2026-01-07T15:10:21","guid":{"rendered":"https:\/\/testsdmv.com\/study-guides\/montana\/chapter-4\/"},"modified":"2026-02-18T05:52:20","modified_gmt":"2026-02-18T05:52:20","slug":"chapter-4","status":"publish","type":"page","link":"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-4\/","title":{"rendered":"\uc81c 4 \uc7a5: DUI \/ DWI \uad00\ub828 \ubc95\ub960"},"content":{"rendered":"\n<div>\n<div>\n<div class=\"dmv-lang-container\">\n    <div class=\"dmv-lang-links\">\n        \n<div role=\"navigation\" aria-label=\"\uc5b8\uc5b4 \uc804\ud658\uae30\" class=\"wpml-ls-statics-shortcode_actions wpml-ls wpml-ls-legacy-list-horizontal\">\n\t<ul><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-en wpml-ls-first-item wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/\" hreflang=\"en\" lang=\"en\" class=\"wpml-ls-link\" aria-label=\"English\uc73c\ub85c \uc804\ud658\" title=\"English\uc73c\ub85c \uc804\ud658\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">English<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-es wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/es\/\" hreflang=\"es\" lang=\"es\" class=\"wpml-ls-link\" aria-label=\"Espa\u00f1ol\uc73c\ub85c \uc804\ud658\" title=\"Espa\u00f1ol\uc73c\ub85c \uc804\ud658\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">Espa\u00f1ol<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-zh-hans wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/zh-hans\/\" hreflang=\"zh-hans\" lang=\"zh-hans\" class=\"wpml-ls-link\" aria-label=\"\u7b80\u4f53\u4e2d\u6587\uc73c\ub85c \uc804\ud658\" title=\"\u7b80\u4f53\u4e2d\u6587\uc73c\ub85c \uc804\ud658\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">\u7b80\u4f53\u4e2d\u6587<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-fil-ph wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/fil-ph\/\" hreflang=\"fil-ph\" lang=\"fil-ph\" class=\"wpml-ls-link\" aria-label=\"Tagalog\uc73c\ub85c \uc804\ud658\" title=\"Tagalog\uc73c\ub85c \uc804\ud658\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">Tagalog<\/span><\/a>\n\t\t\t<\/li><li class=\"wpml-ls-slot-shortcode_actions wpml-ls-item wpml-ls-item-vi wpml-ls-last-item wpml-ls-item-legacy-list-horizontal\">\n\t\t\t\t<a href=\"https:\/\/testsdmv.com\/vi\/\" hreflang=\"vi\" lang=\"vi\" class=\"wpml-ls-link\" aria-label=\"Ti\u1ebfng Vi\u1ec7t\uc73c\ub85c \uc804\ud658\" title=\"Ti\u1ebfng Vi\u1ec7t\uc73c\ub85c \uc804\ud658\">\n\t\t\t\t\t<span class=\"wpml-ls-native\">Ti\u1ebfng Vi\u1ec7t<\/span><\/a>\n\t\t\t<\/li><\/ul>\n<\/div>\n\n    <\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-element-60237eba\">\n<p class=\"gb-text gb-text-c3634ac6\">Use this guide to prepare for the exam, and refer to the official manual for complete details.<\/p>\n<\/div>\n\n\n\n<div>\n<nav>\n<div class=\"gb-accordion gb-accordion-e7958e5c\">\n<div class=\"gb-accordion__item gb-accordion__item-2d596c5a\">\n<div role=\"button\" tabindex=\"0\" class=\"gb-accordion__toggle gb-accordion__toggle-12120285\" id=\"gb-accordion-toggle-12120285\">\n<span class=\"gb-text\">Chapters<\/span>\n\n\n\n<span class=\"gb-accordion__toggle-icon gb-accordion__toggle-icon-1263c1de\"><span class=\"gb-accordion__toggle-icon-open\"><svg aria-hidden=\"true\" viewBox=\"0 0 256 256\"><rect width=\"256\" height=\"256\" fill=\"none\"><\/rect><polyline points=\"208 96 128 176 48 96\" fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"16\"><\/polyline><\/svg><\/span><span class=\"gb-accordion__toggle-icon-close\"><svg aria-hidden=\"true\" viewBox=\"0 0 256 256\"><rect width=\"256\" height=\"256\" fill=\"none\"><\/rect><polyline points=\"48 160 128 80 208 160\" fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"16\"><\/polyline><\/svg><\/span><\/span>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-6b63ace5\">\n<div class=\"gb-element-98e72d80\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-1\/\">1.\u00a0Your License to Drive<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-c4bfb45a\">\n<div class=\"gb-element-c4da4947\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-2\/\">2.\u00a0Speed Limits<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-1c29e21a\">\n<div class=\"gb-element-f77cd666\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-3\/\">3.\u00a0Parking Rules<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-9026573d\">\n<div class=\"gb-element-080c101f\">\n<p class=\"wp-block-paragraph\">4.\u00a0\u2192 DUI \/ DWI Laws<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-1ec6eca9\">\n<div class=\"gb-element-e686fe03\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-5\/\">5.\u00a0Signs, Signals, and Road Markings<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-2d76ab87\">\n<div class=\"gb-element-338a3ac4\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-6\/\">6.\u00a0Navigating the Roads<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-4b74cd13\">\n<div class=\"gb-element-7e2be02f\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-7\/\">7.\u00a0Safe Driving Practice<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-ca33b2c3\">\n<div class=\"gb-element-dc643282\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-8\/\">8.\u00a0Sharing the Road<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-1d091d06\">\n<div class=\"gb-element-41d92b29\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-9\/\">9.\u00a0Emergencies &amp; Legal Responsibilities<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-dbfc8da7\">\n<div class=\"gb-element-bbfb6718\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-10\/\">10.\u00a0Your Vehicle<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-aa625ef1\">\n<div class=\"gb-element-8489cddf\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-11\/\">11.\u00a0Administrative Procedures<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-b1818d2a\">\n<div class=\"gb-element-6d18f130\">\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-12\/\">12.\u00a0Towing a Trailer<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/nav>\n\n\n\n<aside class=\"gb-element-0f6b5a5e\">\n<div class=\"gb-accordion gb-accordion-f456b053\">\n<div class=\"gb-accordion__item gb-accordion__item-93c956a4 gb-accordion__item-open\">\n<div role=\"button\" tabindex=\"0\" class=\"gb-accordion__toggle gb-accordion__toggle-92c5faca gb-block-is-current\" id=\"gb-accordion-toggle-92c5faca\">\n<span class=\"gb-text\">In This Chapter:<\/span>\n\n\n\n<span class=\"gb-accordion__toggle-icon gb-accordion__toggle-icon-5f55c614\"><span class=\"gb-accordion__toggle-icon-open\"><svg aria-hidden=\"true\" viewBox=\"0 0 256 256\"><rect width=\"256\" height=\"256\" fill=\"none\"><\/rect><polyline points=\"208 96 128 176 48 96\" fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"16\"><\/polyline><\/svg><\/span><span class=\"gb-accordion__toggle-icon-close\"><svg aria-hidden=\"true\" viewBox=\"0 0 256 256\"><rect width=\"256\" height=\"256\" fill=\"none\"><\/rect><polyline points=\"48 160 128 80 208 160\" fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"16\"><\/polyline><\/svg><\/span><\/span>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-2c09bf3a\">\n<div class=\"gb-element-1048ca3b\">\n<p class=\"wp-block-paragraph\"><a href=\"#dui-implied-consent\">DUI &amp; Implied Consent<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-8d8d13d7\">\n<div class=\"gb-element-8c52255e\">\n<p class=\"wp-block-paragraph\"><a href=\"#dui-dwi-penalties\">Montana DUI\/DWI Penalties<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-a6496dc6\">\n<div class=\"gb-element-a8df7e5a\">\n<p class=\"wp-block-paragraph\"><a href=\"#quick-numbers\">Quick Numbers Box<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-5964a588\">\n<div class=\"gb-element-1d393715\">\n<p class=\"wp-block-paragraph\"><a href=\"#points-suspension\" data-type=\"internal\" data-id=\"#other-licensing-procedures\">Points\/Suspension Box<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"gb-accordion__content\" id=\"gb-accordion-content-b6c7e0f3\">\n<div class=\"gb-element-1f366173\">\n<p class=\"wp-block-paragraph\"><a href=\"#test-yourself\" data-type=\"internal\" data-id=\"#test-yourself\">Test Yourself<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/aside>\n<\/div>\n\n\n\n<div class=\"study-guide-content\">\n<div class=\"gb-element-548ddc06\">\n<p class=\"wp-block-paragraph\">Driving under the influence of alcohol or drugs is one of the most dangerous choices a driver can make, leading to thousands of preventable deaths and injuries each year. Understanding Montana&#8217;s strict DUI laws is not just a requirement for the written test; it is a critical part of being a responsible driver. The severe legal, financial, and personal consequences of a DUI conviction reflect the serious risk that impaired driving poses to the entire community.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In Montana, it is illegal to operate a motor vehicle while under the influence of alcohol, drugs, or any combination that impairs a person&#8217;s ability to drive safely. These laws are aggressively enforced to remove dangerous drivers from the road. The state uses a combination of scientific measurements, legal principles like Implied Consent, and a tiered penalty system to combat impaired driving.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dui-implied-consent\">DUI &amp; Implied Consent<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A driver can be charged with Driving Under the Influence (DUI) based on several factors. The term encompasses impairment from a wide range of substances, not just alcohol.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Defining DUI<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A person is considered under the influence if their ability to safely operate a vehicle is lessened to any degree by alcohol, marijuana, prescription medication, over-the-counter drugs, illegal drugs, or any combination thereof. A driver does not need to be &#8220;drunk&#8221; to be legally impaired and convicted of DUI.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Blood Alcohol Concentration (BAC)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">BAC is the percentage of alcohol in a person&#8217;s bloodstream. It is the primary scientific measure of intoxication. Montana has established &#8220;per se&#8221; BAC limits, meaning that if a driver&#8217;s BAC is at or above these levels, they are considered legally intoxicated without any further evidence of impairment.<\/p>\n\n\n\n<img decoding=\"async\" width=\"768\" height=\"390\" class=\"gb-media-a5332a3a\" alt=\"A chart compares four standard drinks\u20141.5 ounces of whiskey, 5 ounces of wine, 8\u20139 ounces of a cocktail, and 12 ounces of beer\u2014indicating they are equivalent in alcohol content.\" title=\"standard-alcohol-drink-equivalents\" src=\"https:\/\/testsdmv.com\/wp-content\/uploads\/2026\/01\/standard-alcohol-drink-equivalents-768x390.webp\" srcset=\"https:\/\/testsdmv.com\/wp-content\/uploads\/2026\/01\/standard-alcohol-drink-equivalents-768x390.webp 768w, https:\/\/testsdmv.com\/wp-content\/uploads\/2026\/01\/standard-alcohol-drink-equivalents-300x152.webp 300w, https:\/\/testsdmv.com\/wp-content\/uploads\/2026\/01\/standard-alcohol-drink-equivalents-1024x520.webp 1024w, https:\/\/testsdmv.com\/wp-content\/uploads\/2026\/01\/standard-alcohol-drink-equivalents.webp 1201w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>21 and Over:<\/strong> The BAC limit is 0.08%.<\/li>\n\n\n\n<li><strong>Under 21:<\/strong> Montana has a &#8220;Zero Tolerance&#8221; policy. The BAC limit is 0.02%. This low threshold accounts for incidental exposure and makes any consumption of alcohol by a minor driver illegal.<\/li>\n\n\n\n<li><strong>Commercial Drivers (CDL):<\/strong> The BAC limit is 0.04% when operating a commercial vehicle.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Implied Consent Law<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Montana&#8217;s Implied Consent law is a crucial tool for law enforcement. The law states that any person who operates a motor vehicle on public roadways has, by the act of driving, automatically consented to take a chemical test (breath, blood, or urine) if they are arrested by an officer who has probable cause to believe they are driving under the influence.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Penalties for Refusal<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Refusing to submit to a requested chemical test has immediate and serious consequences for a driver&#8217;s license, separate from any criminal DUI charges. Upon refusal, the officer will seize the driver&#8217;s license on the spot. A first refusal results in a six-month license suspension. A second or subsequent refusal within ten years results in a one-year license suspension.<\/p>\n<\/div>\n\n\n<\/p>\n\n\n\n<div class=\"gb-element-d37020d5\">\n<span class=\"gb-shape gb-shape-ae9d0bde\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\" fill=\"currentColor\" class=\"bi bi-bookmark-star\" viewBox=\"0 0 16 16\">\n  <path d=\"M7.84 4.1a.178.178 0 0 1 .32 0l.634 1.285a.18.18 0 0 0 .134.098l1.42.206c.145.021.204.2.098.303L9.42 6.993a.18.18 0 0 0-.051.158l.242 1.414a.178.178 0 0 1-.258.187l-1.27-.668a.18.18 0 0 0-.165 0l-1.27.668a.178.178 0 0 1-.257-.187l.242-1.414a.18.18 0 0 0-.05-.158l-1.03-1.001a.178.178 0 0 1 .098-.303l1.42-.206a.18.18 0 0 0 .134-.098z\"><\/path>\n  <path d=\"M2 2a2 2 0 0 1 2-2h8a2 2 0 0 1 2 2v13.5a.5.5 0 0 1-.777.416L8 13.101l-5.223 2.815A.5.5 0 0 1 2 15.5zm2-1a1 1 0 0 0-1 1v12.566l4.723-2.482a.5.5 0 0 1 .554 0L13 14.566V2a1 1 0 0 0-1-1z\"><\/path>\n<\/svg><\/span>\n\n\n\n<p class=\"gb-text\">\ud83d\udd12 This is Premium content. Get access to restricted content \u2014 extended DMV Tests, Cheat Sheets, and CDL exams.<\/p>\n\n\n\n<a class=\"gb-text gb-text-865090b9\" href=\"https:\/\/testsdmv.com\/ko\/pricing\/\"> Get Premium Access<\/a>\n\n\n\n<p class=\"gb-text gb-text-01e2e8dc\"><em>Already purchased?<\/em> <a href=\"https:\/\/testsdmv.com\/ko\/sign-in\/\" data-type=\"page\" data-id=\"26983\">Log in<\/a><\/p>\n<\/div>\n\n\n<p>\n\n\n\n\n\n\n<div><nav class=\"tdmv-nav-container\" aria-label=\"Page navigation\"><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-3\/\" class=\"tdmv-nav-btn prev-btn\">< \uc774\uc804 \ucc55\ud130<\/a><a href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-5\/\" class=\"tdmv-nav-btn next-btn\">\ub2e4\uc74c \ucc55\ud130 ><\/a><\/nav>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Use this guide to prepare for the exam, and refer to the official manual for complete details. Driving under the influence of alcohol or drugs is one of the most dangerous choices a driver can make, leading to thousands of preventable deaths and injuries each year. Understanding Montana&#8217;s strict DUI laws is not just a &#8230; <a title=\"\uc81c 4 \uc7a5: DUI \/ DWI \uad00\ub828 \ubc95\ub960\" class=\"read-more\" href=\"https:\/\/testsdmv.com\/ko\/study-guides\/montana\/chapter-4\/\" aria-label=\"\uc81c 4 \uc7a5: DUI \/ DWI \uad00\ub828 \ubc95\ub960\uc5d0 \ub300\ud574 \ub354 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uc138\uc694\">Read more<\/a><\/p>\n","protected":false},"author":30,"featured_media":34217,"parent":55865,"menu_order":4,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-59609","page","type-page","status-publish","has-post-thumbnail"],"_links":{"self":[{"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/pages\/59609","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/users\/30"}],"replies":[{"embeddable":true,"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/comments?post=59609"}],"version-history":[{"count":0,"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/pages\/59609\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/pages\/55865"}],"wp:attachment":[{"href":"https:\/\/testsdmv.com\/ko\/wp-json\/wp\/v2\/media?parent=59609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}