IMSA Signs & Markings II key terms

Any line, word, symbol, or color applied to the road surface to guide, warn, or regulate traffic, such as lane lines, stop bars, crosswalks, and arrows.

A pavement marking running parallel to the direction of travel, used to separate lanes, mark edges, or divide opposing traffic streams.

A pavement marking placed across the travel path rather than along it, including stop bars, crosswalks, yield lines, and speed-change markings.

A longitudinal marking made of gaps and dashes; a broken white line separates lanes in the same direction and generally permits crossing when safe.

A continuous longitudinal marking that generally discourages or prohibits crossing; a solid yellow line separates opposing traffic and a solid white line marks an edge or restricted lane change.

Two parallel yellow lines separating traffic moving in opposite directions; two solid lines prohibit passing, while one broken line permits passing when safe.

A marking placed along the middle of a roadway to separate traffic traveling in opposite directions, typically yellow on two-way roads.

A line marking the outer limit of the travel lane; a solid white edge line marks the right edge and a solid yellow edge line may mark the left edge on divided highways.

A wide solid white transverse line placed across a lane at an intersection or crosswalk, showing where vehicles must stop for a signal, sign, or pedestrian crossing.

Markings defining the pedestrian walking path across a roadway, commonly parallel lines or a ladder pattern, alerting drivers to expect and yield to pedestrians.

A transverse line, often a row of triangles or a broken line, marking where a driver should slow or stop to give way to conflicting traffic.

A wide solid white line used to guide traffic into proper paths, separate turning lanes, or mark the edge of a painted island or gore area.

The triangular paved area between diverging or merging roadways, usually bounded by channelizing lines and often marked with diagonal stripes to show it is not a travel lane.

A pattern of angled stripes painted on the pavement in gore areas or curves to guide drivers and discourage travel over the marked area.

A painted directional symbol showing the permitted movement for a lane, such as straight, left turn, or a combined through-and-turn arrow.

A lane designated for vehicles preparing to turn, often marked with pavement arrows and separated from through lanes by a channelizing line or painted island.

A marking separating adjacent lanes of travel; broken white lines separate same-direction lanes, while solid white lines restrict lane changes near intersections or hazards.

A stretch of roadway where passing is prohibited, typically marked by a solid yellow line on the driver's side of the center line and often accompanied by signs.

A solid white edge line marking the right-hand edge of the travel lane, so named because it helps drivers see the road edge in low visibility.

The ability of a sign or marking to return light from headlights back toward the driver, making it visible at night and in poor weather.

Material applied to signs and sometimes markings that contains glass beads or microprisms to bounce light back to its source, improving nighttime visibility.

A sign that states a traffic law or rule, such as a speed limit, stop, yield, or lane-use requirement; these are typically rectangular with a white background and black or red legend.

A sign alerting drivers to a road condition or hazard ahead, usually diamond-shaped with a yellow background and black symbol or legend.

A sign providing directional or information assistance, such as route numbers, destinations, distances, or services; colors vary by road type and purpose.

An octagonal red regulatory sign with white legend requiring a complete stop before entering the intersection or crossing the marked stop line.

A triangular regulatory sign with a red border and white interior requiring drivers to slow or stop and give way to traffic on the intersecting road.

A rectangular white regulatory sign with black legend showing the maximum lawful speed, or a yellow advisory plaque showing a recommended speed for a specific condition.

A yellow rectangular sign placed below a warning sign, showing a recommended maximum speed for a curve, ramp, or other condition where the posted limit may be too fast.

A sign marking an area near a school where speed limits are reduced and extra caution is required, often paired with flashing beacons and pavement markings.

The red, white, and blue route marker identifying an Interstate highway, with the route number displayed in the shield shape.

A sign identifying a numbered highway route, such as a state, county, or U.S. route shield, helping drivers follow a designated path.

A small guide sign showing the distance along a highway from a reference point, used for navigation, emergency location reporting, and maintenance records.

A sign or device placed on or near a fixed hazard, such as a bridge pier or abutment, to make the obstruction visible to drivers; patterns indicate which side traffic passes.

A small retroreflective post or panel placed along the roadside to outline the alignment of the road, especially through curves and in low visibility.

The degree to which a sign stands out from its surroundings and is noticed by drivers, influenced by size, placement, color contrast, and retroreflectivity.

A traffic control signal for pedestrians, using illuminated walking-person or hand symbols to indicate when it is safe to cross.

An electrically operated device using colored lights to control the right-of-way at intersections, including vehicle heads and pedestrian indications.

Temporary pavement markings and signs used in construction or maintenance areas, often in orange, to guide traffic through changed lane alignments.

A textured or raised strip along the pavement edge or center line that produces vibration and noise to alert drivers who drift out of their lane.