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32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Oregon helmet requirement
Oregon law requires every operator and every passenger to wear a USDOT-certified motorcycle helmet whenever the motorcycle is in motion, with no exemption for adults or experienced riders.
DOT certification label
A sticker or label inside the helmet shell confirming the helmet meets federal safety standards. Helmets lacking it, including novelty skull caps, are not legal in Oregon.
Eye protection rule
Oregon requires goggles, a face shield, or impact-resistant glasses while riding unless the motorcycle is equipped with a windshield or the helmet has a face shield.
Motorcycle equipment checklist
Oregon requires at least a headlight, taillight, brake light, license plate light, rearview mirror, and a horn audible at 200 feet; turn signals are optional but must work if installed.
T-CLOCS inspection
A pre-ride checklist covering Tires and wheels, Controls, Lights and electrics, Oil and fluids, Chassis and suspension, and Stands, used to catch defects before they become failures.
Throttle return check
Roll the throttle open and release it; it must snap back to idle on its own. A throttle that sticks or drags is unsafe and the motorcycle should not be ridden.
Friction zone
The range of clutch lever travel where the engine begins transmitting power to the rear wheel. Riders hold it for slow-speed balance and smooth starts.
Countersteering
At speeds above walking pace, pressing the handlebar grip in the direction of the desired turn leans the motorcycle and causes it to turn that way.
Slow, look, press, roll
A cornering sequence: reduce speed before the turn, look through to the exit, press the inside grip to lean, then roll on throttle smoothly through the curve.
Three-second following rule
Pick a fixed object ahead; when the vehicle in front passes it, you should not reach it for at least three seconds. Add time in rain or darkness.
Lane position choice
Riders choose the left, center, or right third of a lane to maximize visibility and escape space. The center strip often holds slippery oil drips.
Lane sharing with motorcycles
Two motorcycles may ride side by side in one lane only if both riders agree; never share a lane with a car, and go single file in curves.
Four-way stop order
The first vehicle to arrive goes first. If two arrive at the same time, the vehicle on the right has the right-of-way and proceeds first.
Left turn right-of-way
A vehicle turning left must yield to oncoming traffic going straight or turning right, unless a green protected left-turn arrow gives it the right-of-way.
Flashing signal meanings
A flashing red light is treated as a stop sign, requiring a full stop and yield. A flashing yellow light means proceed with caution after checking for hazards.
Right turn on red
After coming to a complete stop, a rider may turn right on a steady red light unless a sign prohibits it, yielding to pedestrians and crossing traffic first.
Swerve or brake rule
Choose one maneuver. Hard braking requires a straight, upright motorcycle, and swerving requires releasing the brakes first so the bike can lean.
Front wheel lock recovery
If the front tire locks and skids, release the front brake lever immediately to regain steering, then reapply pressure smoothly once the wheel is rolling again.
Crossing an obstacle
Rise slightly off the seat, grip the tank with your knees, keep the throttle steady, and strike the object squarely with the front wheel at a right angle.
Oregon BAC limits
Riders 21 and older are impaired at 0.08 percent blood alcohol content. Riders under 21 face a zero-tolerance standard, so any measurable alcohol is a violation.
Implied consent law
By using Oregon roads, a rider agrees to submit to a breath or blood test when lawfully arrested for impaired riding. Refusal can suspend the license.
Fatigue remedy
Fatigue slows reaction time and causes brief sleep episodes. The only effective fix is to stop and rest; loud music, cold air, and caffeine only mask it briefly.
Passenger requirements
A passenger needs a proper seat and foot pegs, must wear a helmet and eye protection, and should hold the rider or grab rail and lean with the bike in turns.
Cargo loading rules
Keep cargo low, centered, and secure within the manufacturer's weight limit, and make sure it cannot shift, block lights, or touch the wheel or exhaust.
Staggered group formation
On straight roads, group riders alternate left and right lane positions with a two-second gap to the rider ahead, switching to single file in curves and turns.
Solid yellow center line
A solid yellow line marks a no-passing zone. A broken yellow line means passing is allowed when safe, and double yellow bars passing in both directions.
Sign shapes and colors
Red octagon means stop, red triangle means yield, yellow diamond warns of hazards, orange diamond marks work zones, and a round yellow sign marks a railroad crossing.
Oregon basic speed rule
Posted limits are maximums for ideal conditions. Riders must slow below the posted limit when rain, darkness, traffic, or road surface makes the speed unsafe.
Being seen at intersections
Riders should assume drivers do not see them, look for eye contact and front-wheel movement, cover the brakes, and keep an escape path at every intersection.
Protective riding gear
Abrasion-resistant jacket and pants, gloves, over-the-ankle boots, and a full-face helmet protect against road rash, foot injury, and facial impact in a fall.
High-visibility riding
Bright colors and reflective material on the jacket and helmet increase the chance other drivers notice the motorcycle, especially at dawn, dusk, and in rain.
Rider responsibility basics
Riding sober, licensed, insured, and trained, plus scanning about 12 seconds ahead, are the strongest habits for avoiding crashes and surviving them.