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jojogunn 10-26-2018 04:40 PM

rolling vs full stop
Years ago, I read that a vehicle with any momentum will use 90% less fuel to get going.
Are there any studies showing how much fuel is consumed from sitting at a light vs having some momentum when it changes?
One the intersections on my commute has a slight downhill grade, and I can row the shifter between neutral and drive to barely close the gap twixt me and the vehicle in front of me until our turn to go. How slow until this is not helping?

redpoint5 10-26-2018 05:07 PM

That's too much of a simplification.

P=mv - that is, energy equals mass times velocity. The more speed you can preserve, the more efficient it is. If you're going 1 MPH as you roll through the intersection, you haven't saved much energy at all.

Slowing well before reaching a stop to preserve momentum is one of the driving tips to maximize fuel economy.

oil pan 4 10-26-2018 05:14 PM

How much does a ticket run for "running a stop sign" cost?

slowmover 10-26-2018 09:12 PM

Bad habits cost far more than dollars.

1). Safety

2). Longevity

3). Economy

Keep the order.


oil pan 4 10-27-2018 08:29 AM

I have been to California multiple times, they like to roll through stop signs.
But their all right compared to MA drivers, to them a stop sign is a suggestion.

Piotrsko 10-27-2018 10:52 AM


Originally Posted by oil pan 4 (Post 582424)
How much does a ticket run for "running a stop sign" cost?

Up to $100 depending on where and citing officer descriptions

redpoint5 10-27-2018 12:27 PM

It's like $300 here. I was cited about 15 years ago and back then it was something like $280. The judge knocks a bit off the ticket just for pleading not guilty, showing up to the court date, and then simply being truthful that you were guilty. I've had all of my many tickets (none in the last 10 years) reduced by doing this.

slowmover 10-28-2018 09:59 AM

Itís not the cost of the ticket, per se. Itís in being moved to a higher risk category by an insurer, thus higher long-term cost. A slew of tickets is an accurate predictor about emotional state. Which is the heart of ďabilityĒ.

Credit Score & Insurable Risk: Your Slave Collar

Every monkey can pilot a car. All over the planet. Only a matter of degree in different skill level, and thatís not fundamental.

Driving involves habitual choices. Skill isnít off-setting. The important decisions about driving are all made before the key is turned.

Have the habit of encroaching the stop line at a four-way? That one is behind the curb line doesnít change the fact one is now IN the intersection. Itís not a technicality.

Same for crossing a solid white stripe. Itís not there because the Highway Department had extra paint that day.

Failure to control oneís self.

Losing the use of the vehicle should be the determinant. There are so few examples of where that is a desirable outcome versus one worse that itís an easy way to make choices. Tell yourself youíll be walking the rest of your life.

One comes to a complete stop ten feet before the stop line. Not five. Why that is so is worth your while in investigating. Extrapolating. Same for the highway lanes merge zone.

The loss problem extends downwards to the life of vehicle components. ďIíll never be able to replace these tires. Tires are no longer availableĒ. Etc.

As always the irony is that trips arenít any longer. Discipline & Duration have a new relationship.

As economy is the premise hereabouts, itís vehicle use that matters most past vehicle spec. That use is premised on habit. Not skill. Not aero bandaids.


Frank Lee 10-28-2018 03:55 PM

I roll through when I've determined the risk of collision or prosecution are nil.
If a tree falls in the woods and nobody is there to hear it, does it still make noise?

fusion210 10-28-2018 06:02 PM

I stop at all the stops. What savings in money or gas is pretty minute as in small.

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