Signs · the night before

Colorado road signs cheat sheet

Read any Colorado road sign in two steps: shape first, colour second. The pairs drivers mix up, and what each category actually obliges you to do.

618 words · source: Colorado Driver Handbook — Signs, Signals and Pavement Markings

Read the shape before you read the words

Shape is the fastest signal a sign gives you, and it works at a distance and in bad weather when the legend is still unreadable. An octagon only ever means stop. An inverted triangle only ever means yield. A diamond is a warning about a condition ahead. A pennant marks a no-passing zone, and a pentagon marks a school zone or school crossing. A rectangle is a regulation or a guide sign, which is the category where you actually have to read the text. Learning the five shapes first means that on the roughly half of sign questions where the artwork is small, you can still eliminate two options before you start reading.

Then read the colour

Colour tells you what kind of instruction the sign carries. Red is stop or prohibition, and it appears on stop, yield, do not enter, and wrong way. Black on white is a regulation you must obey, such as a speed limit or a turn restriction. Yellow is a warning about what is ahead and does not itself forbid anything. Orange appears only in work zones and temporary traffic control. Green and blue are guidance, giving directions or services rather than orders. Brown marks parks and recreation. When a question asks whether a sign is mandatory or merely advisory, the colour is almost always the intended answer.

The pairs people mix up

The exam leans on signs that look nearly identical because that is where memorising the picture fails. Stop and stop ahead are the classic: one obliges you to stop at the line, the other only warns that a stop is coming and does not itself require you to stop. Merge and added lane look similar but describe different geometry, and the correct action differs. The two school signs are another pair: one marks a crossing, the other sets a reduced limit that applies only when children are present or at the posted times. Study these as pairs rather than one at a time, and say the required action out loud rather than the name.

Warnings are not permissions

A warning sign tells you that a hazard exists; it does not grant you anything and it does not override a rule you already owe. A curve advisory sign suggests a speed for the curve, but the basic speed rule still governs, and if the pavement is wet you are required to go slower than the advisory number. The same applies to a chevron or an arrow board in a work zone: they tell you where the lane goes, not that you may use the shoulder. Questions are written to catch the assumption that a warning sign changes who has the right of way, and it never does.

Orange means the rules get steeper

Work zone signs are the only orange ones, and the state treats the zone differently once you are in it. A flagger has authority over the posted sign, so when a flagger contradicts a sign you follow the flagger. Signs in these zones are temporary, which means the lane markings on the pavement may disagree with them, and the temporary sign wins. Expect a question where a worker is present and the correct answer involves slowing more than the posted limit rather than simply holding it.

How to use this page

Do not read this the morning of the test and expect it to stick. Spend ten minutes on the shape and colour systems, then open the sign gallery and work through one category at a time, saying the required action for each sign rather than its name. Come back here afterwards and check the pairs section again, because the pairs are the ones that survive into the exam. If you can state what a sign obliges you to do rather than what it is called, you have the sign questions covered.