What is a mountain vision?
Quote:
Originally Posted by cooltiger
Would it be possible for you to guide us how to reach CA in 3 days.?
Welcome to the Great American RoadTrip Forum! Such a road trip is possible, but not very wise. It is 2804 miles by the shortest possible distance. I would suggest using I-80 straight across. It will take you you about 51 hours to cover this distance. Which means you need to drive at least 17 hours per day. But really you need to expect to drive 20 hours for each of the first two days to enable sufficient time to make your flight out of Oakland. It will cost you about $534 in fuel. Be sure to read our tips about taking Speed Runs and drive safe!
For a detailed map and routing suggestions, I suggest you use this link generated by Google Maps.
Mark
Ditto on the moutain vision?
And, you're doing this trip, why?
Experience trumps software everytime.
Mark's time estimate comes from his many years of living and working on the road where he has logged tens of thousands of miles doing roadtrips. Add to that, many of us here are also experienced roadtrippers.
I use MS Streets & Trips to plan my roadtrips and I do look at the time estimator. I sometimes plug into Mapquest and the other routing websites to see what they say as well. But I only use these as a very rough guide. They're certainly not gospel!
For example, all these routing options tell me that a drive from my home to Safeco Field in Seattle takes me about 2 hours. And I know that, more often than not, this is BS. I know that there are certain times of day, and certain days of the week, that I can make it in 1.5 hours because traffic is thin and the general flow of traffic is going to be about 10-12 miles OVER the speed limit. So, unless I want to drive slower than the flow and cause a traffic flow problem, I know I'm going to fly all the way there. Yet, I also know that traffic on certain days and at certain times is going to be gross and I can count on the same trip taking, at minimum 3 hours, and maybe more.
The software packages do not take into account traffic conditions, weather, road construction, slowdowns for accidents, and other situations that may effect your driving time.
Add to that, they also don't figure in the stops you will need to make for gas, bathrooms, stretching, etc. Even if you just make the minimum number of stops and make them as quick as possible, you are usually looking at about 1-2 hours over a long day's drive to do these things, at minimum.
So, over many long years, most of us agree that figuring somewhere around 55mph over the course of a day allows for those times when you can zip along at 70-75mph, and those times when conditions cause you to slow to 40mph for awhile. And 55mph allows for a few quick stops for fuel, etc. along the way.
I don't really recommend this but, a few years back, I was doing a speed run on the way home from a car show with a group of cars in which I was the only car without radar detectors. It was a weekday, the roads were fairly clear of other cars, and the roads were smooth, and the weather was clear and dry. So, we drove about 650 miles that day, we had stretches where we went about 110mph but, most of the time, we were traveling between 80-90mph. Of course, we had times when we had to slow down to the speed limit due to traffic, or because we were driving on interstates going through cities and didn't want to risk a ticket there when there was more state patrol presence, and there were a few times when we had to slow to 30-40mph to get through some small towns that the freeway went through. Our pit stops were fairly minimal but we did make a few bathroom breaks, gas breaks, and a few times when we make a quick stop for a scenic view. And, because we wanted to burn miles, these stops were really fast. REALLY fast! Well, by the end of the day, it took us about 10.5 hours to cover that 650 miles for an average speed of about 62mph.
So, even though we had stretches of 100+mph, and many more stretches of 80-90mph, we still covered that day's drive at an average speed of about 62mph. Go figure. I hope this helps you understand why you really can't depend on the time estimates given by these software programs.
I'm confident that Mark's estimates are usually going to be pretty close.
None observed, none taken
Quote:
Originally Posted by thom
I was just asking in order to find out why the driving time estimates would be off by a factor of as much as one-third,
It actually is even more complicated than that. Just about all of these programs use alogorithms that do, in fact, factor in construction, traffic etc, but they are still a little to optimistic. Don't worry about "insulting" me -- I always travel faster than the posted (upper) limit -- I also always strictly follow those pesky 25 mph signs in rural towns. It has been my experience, tested in ways similiar to Judy's methodology, that to actually drive an average speed of 75 mph over a 10-hour driving day, I had to be well over triple digits for long stretches of roadway. Which is why we adopted those "rules of thumb" -- it is possible to beat those standards -- but it is rare in incidence.
I drove from LA to Washington DC in just a tad over 65 hours one time. You can do the math. Not wise!
Mark