DEAR EDITOR:

How many times have you heard, or possibly even said, “No, really, I can stop.” Although often applied to a vice, today we’re discussing another summer safe driving subject. Did you ever wonder how roadway speed limits are established? Several factors go into establishing a speed limit, but for the sake of this conversation, let’s address what are termed “Statutory Speed Limits.” These are speed limits that the state Legislature establishes, applies, and enforces by law. They may vary from state to state and can change due to conditions, but here’s a good rule of thumb:

25 mph in residential settings.

55 mph on rural highways.

70 mph on interstate highways.

Now, let’s examine the “stopping distance” one needs to consider when adhering to established speed limits.

I want to focus on the residential, 25 mph. What I have experienced, and I’m sure many others have, the average speed in a residential area is right around 30-35 mph; that 25 mph just seems way too slow. What’s the big deal with going a little over the speed limit? 35 mph isn’t that fast, really. I can stop!

Factors that take into consideration stopping distance are road conditions, reaction time and, most importantly, your speed. Obviously, for this discussion, we are going to consider that your vehicle is in great condition, especially the tires and the brakes.

An important factor in this calculation is your reaction time,” the time it takes you to recognize the need to stop, foot off the accelerator and begin to apply the brakes. Reaction times vary due to age, paying attention and no distractions. They can range from 1.5 to 2.5 seconds. It is this reaction time that truly impacts the stopping distance.

Consider this: at 20 mph, your car will travel approximately 30 feet per second. Therefore, before you even attempt to apply the brake (reaction time), you’re going to travel 40-plus feet. Now add the braking of the vehicle, brakes applied, tires on the road, co-efficient value/

At 30 mph before that car comes to a stop, you’re going to travel at least 75 feet! With the average length of today’s vehicle being right around 14.7 feet, you are going to travel five-plus car lengths. Is that enough space to safely stop when that child runs out in front of you? I don’t believe so.

Pay attention to the speed limits; they are established for a reason, a very good reason. Your safety and the safety of others.

Have a safe summer.

JOHN P. LESEGANICH

Canfield