No amount of alcohol is safe to drink before driving. Even with a blood alcohol level of 0.04 percent, which is below the legal limit for people age 21 and older, you are two to seven times more likely to be involved in a crash than a person with no alcohol in their blood.

Always be prepared to yield to any oncoming trains before crossing railroad tracks, particularly if there are no lights or gates controlling the crossing. Never start to cross the tracks until there is room for your entire vehicle on the other side of the tracks. Due to the risk of a vehicle stalling, it is not wise to shift gears when crossing railroad tracks.

The law does not give anyone the right-of-way at intersections; it only says who must yield. Even when one driver is legally required to yield the right-of-way, if they fail to do so, other drivers are still required to stop or yield as necessary to avoid a crash.

If a vehicle using high beams comes toward you, flash your high beams quickly a few times. If the driver does not dim their lights, look toward the right side of the road. This will keep you from being blinded by the other vehicle’s headlights.

A double solid yellow line down the center of a two-way road means that it is prohibited for traffic from either direction to cross the center to pass.

Pavement can become very slippery within the first 10 to 15 minutes of a rainstorm because the rain causes oil in the asphalt to rise to the surface of the road. This problem becomes even worse in hot weather. The heat combined with the water causes more oil to rise to the road surface.

A red flashing traffic signal has the same meaning as a stop sign. When approaching a red flashing signal, come to a complete stop and proceed when it is safe to do so. A stop sign may sometimes also be posted where this signal is located.

If an approaching driver fails to dim their high beams, glance toward the right side of the road. This will keep you from being blinded by the other vehicle’s headlights and will allow you to see enough of the road to stay on course until the other vehicle has passed.

Consuming any type of alcohol can have negative effects on your reflexes and judgment. It does not matter which type of alcohol is consumed, only how much alcohol has entered a person's bloodstream.

A green steady arrow means you may pass through the intersection in the direction that the arrow is pointing. Oncoming traffic is required to stop for turning traffic.

Yield to pedestrians and cars that may be caught in an intersection when you have a green light. Be careful around pedestrians under every circumstance.

Yellow lines are used to divide traffic moving in opposite directions.

The legal drinking age in Pennsylvania is 21.

If your vehicle starts to skid on a wet or icy road, look and steer in the direction you want to go. If the rear of your vehicle is skidding to the left, turn the wheel to the left. If the rear of your vehicle is skidding to the right, turn the wheel to the right.

You may turn left after stopping at a red light if you are in the left lane of a one-way street and are turning onto another one-way street, unless a posted sign prohibits it. You must first stop and yield to pedestrians and other traffic.

When you resume driving again after being passed by an emergency vehicle, you must remain at least 500 feet behind it.

When you park on a downward-facing slope, turn your wheels sharply toward the side of the road. This way, if your vehicle starts to roll downhill, it will roll away from traffic.

When roads become wet, you should increase your following distance to five or six seconds.