What is the 85th percentile?
Your score on a test is at the 85th percentile. What does this mean? Answer: It means that 85\% of the scores were below your score and 15\% of the scores were better than your score. If your score is in the 85th percentile, it means that 85\% of the scores are below your score and 15\% are above your score.
How much following distance should you maintain between you and the vehicle in front of you?
Trust the safety and reliability of Safelite The rule of thumb is to maintain at least a three-second following distance, giving you time to react and avoid potentially dangerous situations. You can calculate this by using a fixed object, such as a pole or an overpass to determine how far in front of you the car is.
What are speed limits based on that makes it important for them to follow?
All speed limits are based on ideal driving conditions. Remember, breaking the posted speed limit and driving faster than is safe for current conditions is dangerous and illegal. According to the law you may not drive faster than is reasonably safe for road conditions, regardless of the posted speed limit.
What is the maximum speed you would drive if you can only see 400 ft ahead?
15 mph
Some school zones may have speed limits as low as 15 mph. If you are driving within 100 feet of a railroad crossing where you cannot see the tracks for 400 feet in both directions, the speed limit is 15 mph. Additionally, the maximum speed limit is 55 mph for vehicles towing trailers.
What does 55th percentile mean?
A percentile indicates the value at or below which a certain proportion of a population falls. For example, if your baby’s weight is at the 55th percentile, it means that 55\% of the population weigh the same or less than your child (and 45\% of the population are heavier).
What 50th percentile means?
If a child’s weight is at the 50th percentile line, that means that out of 100 normal children her age, 50 will be bigger than she is and 50 smaller. Similarly, if she is in the 75th percentile, that means that she is bigger than 75 children and smaller than only 25, compared with 100 children her age.
How much following distance should you maintain between you and the vehicle in front of you quizlet?
How much space should you keep in front of you? One good rule says you need at least one second for each 10 feet of vehicle length at speeds below 40 mph. At greater speeds, you must add 1 second for safety. For example, if you are driving a 40-foot vehicle, you should leave 4 seconds between you and the vehicle ahead.
What is the minimum recommended following distance between you and the vehicle you are following if you are driving 35 miles per hour?
For instance, if you are traveling at a speed of less than 35 mph, you should be safe with a two-second cushion. If your speed increases to 35-to-45 mph, a three-second following distance should be safe, while a four-second distance would apply if you were going 46 to 70 mph.
What are the 4 types of speed limits?
In California, there are four major Speed Laws: Basic, Prima Facie, Maximum, and Minimum.
What are the 3 different types of speed limits?
Absolute, Presumed, and Basic Speed Limits There are essentially three types of speed limits being enforced around the country: “absolute,” “presumed,” and “basic” speed limits. As you might imagine, the defenses differ for each one.
What are the 4 major speed laws?
In California, there are four major Speed Laws: Basic, Prima Facie, Maximum, and Minimum. As a state with approximately 40 million residents, each speed law mandates different requirements for drivers. The overarching goal is to protect the safety of everyone on or near the road.
How do you calculate average speed on a road trip?
Make sure you subtract any rests or stops you made from the total trip duration. If the total distance travelled was 500 miles and the time it took you was 5 hours, then your average speed was 500 / 5 = 100 miles per hour (mph).
What is a good average speed for a cyclist?
Some of my observations (cruising speed based on a flat, paved road in good condition): 20km/h (12.4 mph) – many “occasional” cyclists ride around this speed. 25km/h (15.5 mph) – most commuters. 30km/h (18.6 mph) – fast commuters, slower roadies.
What is a good average speed for a long distance ride?
I would suggest that the reasonable speeds for very long distance riding are 15km/h total average including breaks up to 600km, or 13.33km/h for 1000/1200km/h rides.
How do you find the distance between two speeds?
d = v x t where v is the velocity (average speed), t is the time and d is distance, so you can read it as Distance = Speed x Time. The result will depend on the unit of the speed metric, for example if speed is given in mph, the result will be in miles, if it is given in km/h, the result will be in kilometers.