Driving speed and saving money

[dafatha00]

Originally posted by: palswim

Originally posted by: dafatha00
What about taking into account the possibility of getting a speeding ticket?

What's the possibility of getting a speeding ticket?

Depends where you are, I guess. Here in San Diego, the officers won't bat an eye if you're going under 75 or 80 (on the 65 mph part of the freeway).

The point is if you're comparing the costs of speeding versus not-speeding, you need to factor in every possible variable to get an accurate assessment. For instance, if you take 400 30-mile trips at 80 mph and get even one $200 speeding ticket within those 400 trips, then you need to add in the expected probability costs of $.50 for each trip.

 

[Kalvin00]

Originally posted by: eos

Originally posted by: Kalvin00
When I was driving to Nevada towing a 4-wheeler, when doing 55-60mph with AC on, I would get 21 mpg (this is a 2002 Dodge Ram 2500 Diesel truck). Going 72 or so, I would get 16-17.

That's my scientific data.

Were you running at the same mph between fill ups?

I was taking this from the computer reading.

 

[Demon-Xanth]

I found I got the same gas milage at 65, 75, and 85MPH commute speeds (though I ended up getting a ticket doing 82 ina 65...). An engine's efficency isn't the same at every RPM. There are engine speeds at which the engine is more efficient than others. Which is also why, going from 3.55 to a 3.92 rear end doesn't effect gas milage at all. And going to a taller rear tire (effectively lowering the cruising RPM) made me get WORSE gas milage.

2500RPM in a pretty sweet spot efficency wise for my car. But highway speed is 2000-2200RPM. (peak torque is 3500, peak power 4500)

 

[palswim]

Originally posted by: dafatha00

Originally posted by: palswim

Originally posted by: dafatha00
What about taking into account the possibility of getting a speeding ticket?

What's the possibility of getting a speeding ticket?

Depends where you are, I guess. Here in San Diego, the officers won't bat an eye if you're going under 75 or 80 (on the 65 mph part of the freeway).

The point is if you're comparing the costs of speeding versus not-speeding, you need to factor in every possible variable to get an accurate assessment. For instance, if you take 400 30-mile trips at 80 mph and get even one $200 speeding ticket within those 400 trips, then you need to add in the expected probability costs of $.50 for each trip.

Good point.

For my statistics, I believe I've taken at least 400 30-mile trips at 75-80 (though I've slowed down quite a bit since those days) and never once got a ticket - my only speeding ticket was on a surface street when gas mileage or time wasn't an issue (I was just young and dumb; actually, still am).

 

[feelingshorter]

Originally posted by: dafatha00

Originally posted by: Ricemarine

Originally posted by: dafatha00
What about taking into account the possibility of getting a speeding ticket?

Right here?. :laugh:

Precisely. This refutes the OP's argument.

Link doesnt take into account of time. The OP is saying that your time is worth more than your gas money. Meaning that if you can get somewhere 10-15 mins quicker, and put it into relation with how much you make at your job in that time, then driving faster (only a little, perhaps 5-10 miles over 60 as most cars, Japanese at least, run most efficiently at 59mph (since they are designed that way)) will save you money in a sense.

 

[dafatha00]

Originally posted by: feelingshorter

Originally posted by: dafatha00

Originally posted by: Ricemarine

Originally posted by: dafatha00
What about taking into account the possibility of getting a speeding ticket?

Right here?. :laugh:

Precisely. This refutes the OP's argument.

Link doesnt take into account of time. The OP is saying that your time is worth more than your gas money. Meaning that if you can get somewhere 10-15 mins quicker, and put it into relation with how much you make at your job in that time, then driving faster (only a little, perhaps 5-10 miles over 60 as most cars, Japanese at least, run most efficiently at 59mph (since they are designed that way)) will save you money in a sense.

See my above post. The OP definitely has a good idea regarding the amount of money you could save by driving more quickly, but you need to also factor in other money-costing variables when speeding.

 

[dxkj]

Originally posted by: DrPizza
I agree with the OP about personal savings, to a degree. But, a lot of the time, people driving faster really don't save a significant amount of time. They just tend to be nearer to the front of the line at the first red light after the off-ramp.

Come on man... you know the law of averages. For every time he is in the line, he might also hit it green and move off.... and if it IS the front of the line, it might be a 3 minute wait where only half the line gets off, so it ends up saving even more time.



I drive 85 miles one way to work. If I go 75 mph, i can usually get there in 1 hr 05 - 1hr 10 mins . If I were to drive 65 it would take nearly 1hr 30 mins (slower than the speed of traffic in a 55, so having to yield, get over all the time)

 

[SampSon]

Originally posted by: dafatha00

Originally posted by: Ricemarine

Originally posted by: dafatha00
What about taking into account the possibility of getting a speeding ticket?

Right here?. :laugh:

Precisely. This refutes the OP's argument.

That link is such a load of circle jerking bureaucratic crap.
I drive 1,000 miles a week, in all types of conditions and terrain.
The only time I ever see a significant drop in MPG (3mpg) is when I actually drive over 90mph.

 

[mwtgg]

Originally posted by: palswim

Originally posted by: dafatha00
What about taking into account the possibility of getting a speeding ticket?

What's the possibility of getting a speeding ticket?

Depends where you are, I guess. Here in San Diego, the officers won't bat an eye if you're going under 75 or 80 (on the 65 mph part of the freeway).

That's funny. On Tuesday I was doing 80 (in a 55) in the leftmost lane on I-476 and the cop did nothing.

 

[PrinceofWands]

As long as you're under the speed limit and safe I think you're totally right. If you violate either of those then you have to figure tickets, jail time, and possible injury or death into your equation.

 

[spidey07]

Originally posted by: PrinceofWands
As long as you're under the speed limit and safe I think you're totally right. If you violate either of those then you have to figure tickets, jail time, and possible injury or death into your equation.

jebus, it's the guys driving the speed limit that CAUSE the accidents.

 

[spidey07]

Originally posted by: SampSon
Precisely. This refutes the OP's argument.

That link is such a load of circle jerking bureaucratic crap.
I drive 1,000 miles a week, in all types of conditions and terrain.
The only time I ever see a significant drop in MPG (3mpg) is when I actually drive over 90mph.
[/quote]

Bingo. Me too (1000 miles a week, watch my mileage religeously)

I see no signficant difference between 65 and 90, maybe 1 mpg at most.

And even then cruising at 95-100 only drops it a single mpg.

 

[PrinceofWands]

Originally posted by: spidey07

Originally posted by: PrinceofWands
As long as you're under the speed limit and safe I think you're totally right. If you violate either of those then you have to figure tickets, jail time, and possible injury or death into your equation.

jebus, it's the guys driving the speed limit that CAUSE the accidents.

No, it's not. It's arrogant, self-centered, bastards who think they have rights beyond others and think the law doesn't apply to them. And NOTHING makes me happier than seeing them pulled over getting multi-hundred dollar fines for their egocentrism (unless its seeing them kill themselves in a fiery crashes so they no longer pollute the highways).

Sorry, pet peeve of mine.

 

[spidey07]

Originally posted by: PrinceofWands
No, it's not. It's arrogant, self-centered, bastards who think they have rights beyond others and think the law doesn't apply to them. And NOTHING makes me happier than seeing them pulled over getting multi-hundred dollar fines for their egocentrism (unless its seeing them kill themselves in a fiery crashes so they no longer pollute the highways).

Sorry, pet peeve of mine.

It's OK. Just stay to the right and you'll be just fine. It's not egocentrism. time really is money. They are equal.

ps - 24 over ticket is only 140 bucks in my state. Which means driving 89 is no big deal. It's the flow of traffic. plus, same mileage, much less time, and time is money

Nice radar detector for the martha fargin win.

 

[mwtgg]

Originally posted by: PrinceofWands
No, it's not. It's arrogant, self-centered, bastards who think they have rights beyond others and think the law doesn't apply to them. And NOTHING makes me happier than seeing them pulled over getting multi-hundred dollar fines for their egocentrism (unless its seeing them kill themselves in a fiery crashes so they no longer pollute the highways).

Sorry, pet peeve of mine.

Until they raise the limit to something which isn't completely unreasonable, I'm going to continue doing what I'm doing.

Also, who's worse -- the self-centered jerk doing 85mph or the self-centered jerk who thinks it's their right to self-police the highway by camping the lefthand lane doing 60-65?

 

[PrinceofWands]

Originally posted by: mwtgg

Originally posted by: PrinceofWands
No, it's not. It's arrogant, self-centered, bastards who think they have rights beyond others and think the law doesn't apply to them. And NOTHING makes me happier than seeing them pulled over getting multi-hundred dollar fines for their egocentrism (unless its seeing them kill themselves in a fiery crashes so they no longer pollute the highways).

Sorry, pet peeve of mine.

Until they raise the limit to something which isn't completely unreasonable, I'm going to continue doing what I'm doing.

Also, who's worse -- the self-centered jerk doing 85mph or the self-centered jerk who thinks it's their right to self-police the highway by camping the lefthand lane doing 60-65?

I hear ya, and over slow is equal to overfast. Left-hand lane is passing, that means I have no problem with marginally over the posted speed limit there. I do have a problem with aggressive driving because people think that their need to get somewhere 6 minutes earlier entitles them to endanger the life of my daughter.

 

[mwtgg]

Originally posted by: PrinceofWands

Originally posted by: mwtgg

Originally posted by: PrinceofWands
No, it's not. It's arrogant, self-centered, bastards who think they have rights beyond others and think the law doesn't apply to them. And NOTHING makes me happier than seeing them pulled over getting multi-hundred dollar fines for their egocentrism (unless its seeing them kill themselves in a fiery crashes so they no longer pollute the highways).

Sorry, pet peeve of mine.

Until they raise the limit to something which isn't completely unreasonable, I'm going to continue doing what I'm doing.

Also, who's worse -- the self-centered jerk doing 85mph or the self-centered jerk who thinks it's their right to self-police the highway by camping the lefthand lane doing 60-65?

I hear ya, and over slow is equal to overfast. Left-hand lane is passing, that means I have no problem with marginally over the posted speed limit there. I do have a problem with aggressive driving because people think that their need to get somewhere 6 minutes earlier entitles them to endanger the life of my daughter.

Gotta think of the children, right? I don't drive over the speed limit because I'm in a hurry, I do it because it feels comfortable in my car. How can you have wide open lanes and dicker around doing 55? Sorry, I know of a few two lane ROADS with a 55mph speed limit, you can't have that on a damned interstate.

 

[jagec]

Originally posted by: PrinceofWands
As long as you're under the speed limit and safe I think you're totally right. If you violate either of those then you have to figure tickets, jail time, and possible injury or death into your equation.

BS. Studies have shown that 5-7 over the limit is the safest speed (85th percentile), and besides, no one gets a ticket for 5 over.

Obviously that's different if it's raining, snowing, icy, or traffic is moving slower or faster than average. The speed of traffic is the safest speed, in almost all cases...and it won't get you pulled over.