The railroad crossing sign is called a crossbuck and is the most common warning sign required at all public railroad crossings.
What are the railroad crossing arms called?
Railroad crossing arms are officially called "crossing gates" or "signal arms" and are part of active warning systems that descend to block vehicle traffic when a train approaches.
These arms team up with flashing red lights and bells to alert drivers. According to the Federal Railroad Administration, active crossings in the U.S. number over 200,000. They’re designed to prevent collisions by physically blocking vehicles during train crossings.
What type of sign is a railroad crossing?
A railroad crossing sign is classified as a warning sign under the Manual on Uniform Traffic Control Devices (MUTCD).
The crossbuck sign specifically falls under Section 8B.02 of the MUTCD. That section requires all public railroad crossings to display this sign. The Federal Highway Administration states warning signs like this use yellow backgrounds and black symbols to grab attention fast.
What is a crossbuck signal?
A crossbuck signal is a yield sign that requires drivers to stop and yield the right-of-way to oncoming trains.
When multiple tracks are present, a supplemental sign below the crossbuck shows the number of tracks. The Operation Lifesaver organization points out the crossbuck gets its name from the "X" shape that looks like a railroad crossing. It’s legally recognized in all 50 states as a regulatory yield requirement at both active and passive crossings.
What are the 4 types of road signs?
The four main types of road signs are regulatory, warning, guide, and construction signs as defined by the Manual on Uniform Traffic Control Devices (MUTCD).
Regulatory signs (think stop, yield, speed limit) are usually red, white, or black. Warning signs (like curve ahead or pedestrian crossing) are yellow with black symbols. Guide signs give directions or mileage and are green or blue, while construction signs are orange. The FHWA MUTCD sets the national standard for all traffic control devices in the U.S.
What vehicle must stop at all railroad crossing?
School buses with or without passengers, transit buses carrying passengers, and vehicles transporting hazardous materials must stop at all railroad crossings.
This rule comes from 49 CFR 392.10. It says these vehicles must stop within 50 feet but no closer than 15 feet of the tracks, listen, and look for trains before moving forward. The Federal Motor Carrier Safety Administration enforces these rules to protect high-risk passengers and sensitive cargo.
Is it illegal to go around railroad crossings?
Yes, it is illegal in all U.S. states to go around lowered crossing gates or ignore flashing lights at a railroad crossing.
Trains can’t stop quickly or swerve to avoid crashes, so following the signals is crucial. The National Highway Traffic Safety Administration reports that breaking railroad crossing laws can lead to fines, license suspension, or even criminal charges depending on state laws. Some states treat repeat violations as felonies.
What is the difference between a controlled and uncontrolled railroad crossing?
Controlled railroad crossings have active warning devices such as flashing lights, bells, and crossing gates, while uncontrolled crossings have no signals or gates.
Controlled crossings are usually in cities or busy areas. Uncontrolled crossings are more common in rural spots. The FRA says uncontrolled crossings rely only on passive signs like the crossbuck. That means drivers have to be extra careful and watch for trains themselves.
What is the difference between an active and a passive railroad crossing?
An active railroad crossing uses automated signals (lights, bells, gates), whereas a passive crossing relies only on static signs like the crossbuck with no moving parts or alerts.
Active crossings give real-time warnings when a train’s coming. Passive crossings depend entirely on drivers spotting the crossbuck and judging for themselves. According to the Operation Lifesaver, passive crossings are involved in way more crashes because there’s no automatic alert.
What are the 3 types of railroad crossings?
The three types of railroad crossings are vehicular grade crossings, pedestrian grade crossings, and emergency grade crossings.
Vehicular crossings let cars and trucks cross the tracks. Pedestrian crossings are for walkers and cyclists. Emergency crossings are built for fire and rescue vehicles. The Federal Transit Administration sorts these by who uses them and what safety gear they need.
What are 4 things that are present at a railroad crossing?
Four common elements at railroad crossings are the crossbuck sign, flashing lights or gates, audible bells or horns, and road markings such as "X" or "RXR" on the pavement.
You might also see advanced warning signs like “Railroad Crossing Ahead” and reflectorized materials to help with nighttime visibility. The Federal Highway Administration lists these as the minimum safety requirements for public crossings.
What is a grade crossing for railroad?
A grade crossing is where a road and railroad tracks intersect at the same level or grade.
These crossings follow safety rules from the Federal Railroad Administration. The FRA estimates over 250,000 grade crossings exist in the U.S. as of 2026. They’re different from overpasses or underpasses where roads and tracks are separated by height.
What are the 8 colors used for road signs?
The eight standard colors used for road signs are red, yellow, white, orange, black, green, blue, and brown.
Each color has a specific job: red means stop or don’t do something, yellow warns of danger, white regulates (like speed limits), orange marks construction zones, black gives route info, green shows directions, blue points to services, and brown points to recreation or culture spots. The MUTCD sets these color rules.
Why are road signs green?
Road signs are green primarily because this color was designated for directional guidance to help drivers recognize route and highway information quickly.
The FHWA MUTCD made green the standard for guide signs back in 1966. Green is easy to spot, even at high speeds, and feels safe. Some cities use other colors for local roads, but green stays the national standard for interstates and state highways.
What are the most important road signs?
The most important road signs include the stop sign, yield sign, railroad crossing (crossbuck), speed limit signs, school zone signs, and no passing zone signs.
These signs matter because they control traffic (stop, yield), warn of danger (railroad, school zone), set speed rules, or block risky moves (no passing). The NHTSA says breaking these signs is a top cause of crashes in the U.S.
What is not required to stop at a railroad crossing?
Private passenger vehicles not carrying hazardous materials are not required to stop at railroad crossings unless signals are active.
Still, all drivers should slow down, look both ways, and stop if the signals tell them to. The FMCSA makes it clear: only school buses, transit buses with passengers, and vehicles hauling hazardous materials must stop at every crossing, per 49 CFR 392.10.
Edited and fact-checked by the MeridianFacts editorial team.
