Who am I to believe?

 

I will be traveling from Baton Rouge, LA to Georgetown, TX. So I just ran a get directions on Google, Mapquest, and Yahoo and compared to my Garmin suggested route (Map Version 2008). Three different results came up. Google and Mapquest agree, and the others are different. I am now wondering which route is the best to take.

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Randy C530, Nuvi 52

Is your GPSr

Is your GPSr set to the same "conditions" as the other Mapping software ???

ie: Fastest vs Shortest
What avoidances do you have set ??????

What amount of time is given for each mapping solution ?

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MrKenFL- "Money can't buy you happiness .. But it does bring you a more pleasant form of misery." NUVI 260, Nuvi 1490LMT & Nuvi 2595LMT all with 2014.4 maps !

Good question Ken

Forgot to add that my GPSr is set to Fastest Time.
I don't have it with me but will check to see what route I get with the Shortest distance setting...(not sure about the other settings.. don't think that I have these on my C530.)

The main choice differences were 1) a Hwy 59 route with Garmin 2) a Hwy 290 route with Mapquest and Google, and 3) a mostly I-10 route with Yahoo. I'll run the shortest distance route this evening (..unless someone else with version 2008 happens to do a Baton ROuge, LA to Georgetown, TX test under shortest distance and posts first..)

What methodology do the web based routers use?

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Randy C530, Nuvi 52

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Grandad-2003 wrote:

I will be traveling from Baton Rouge, LA to Georgetown, TX. So I just ran a get directions on Google, Mapquest, and Yahoo and compared to my Garmin suggested route (Map Version 2008). Three different results came up. Google and Mapquest agree, and the others are different. I am now wondering which route is the best to take.

One thing is for sure.....each route will get you to your destination. There is always more than one way to skin a cat wink

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******************Garmin Nüvi 1300T****************Member 6523*******************

route criteria

some of the maps take road construction in to consideration, also avoid toll roads and metro areas, even though you may be traveling at non peak traffic hours. Some maps consider 2 lane vs. 4 lane due to lover average speed than posted on 2 lanes. Pick a route you like that fits your schedule.

.

I still look at a road atlas. Don't underestimate the human brain. No one has yet duplicated it. If the GPS gives me directions I don't like, I use my one pass-through point to program it to go my way.

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nuvi 200 | lifetime maps

Which wy is best?

I have found in my year with a garmin Nuvi 350 that on very long trips ( over 500 miles is long to me) I use Google maps and then just tell the Garmin where I want to end up. early in the trip, I play close attention and ignore the Garmin if it is going to take me a major different way. I have one trip I do that the garmin route actually adds about 25 minutes to an 8 hour trip, and the route change occurs with in the first hour of the trip.

Your milege may vary.

Good Points Everyone..

I've made this trip about 4 times already and have taken 2 of the 3 routes. The only route that I've not taken is the one suggested by my C530... So while I'm tempted, I'm probably sticking with the route I've tried and like most.

Nonetheless, I'm still a bit curious as to the algorithm and/or other factors (mentioned above) that route determiation programs are using to make their recommendations.

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Randy C530, Nuvi 52

AAA has online mapping for members

By the way, I have no idea what map source they use, but if anyone has Triple-A (AAA) their web site has online trip planning including modifying the route from the suggested one. So another mapping tool you can use before leaving on a trip to get another opinion on how to best get to your destination.

PT

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Garmin nüvi 200 (my first GPS), 780, & 3700 Series. And a Mac user.

AAA Website & Mapsource

Guttermouth wrote:

(snip) but if anyone has Triple-A (AAA) their web site has online trip planning including modifying the route from the suggested one. (snip)

PT

When I am planning a long trip I use the AAA web-site Trip-tik function and put in waypoints I want to travel through. I also use Mapsource which you can do the same function with ! Mapsource is very functional since you can put all your favorites in the mapping function.

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MrKenFL- "Money can't buy you happiness .. But it does bring you a more pleasant form of misery." NUVI 260, Nuvi 1490LMT & Nuvi 2595LMT all with 2014.4 maps !

Don't trust any of them for the final destination

I recently took a trip to Florida to visit friends. I had three different destinations. I used my Garmin for all three. The first two were right on target. The third put me about a half mile from my friends house in the middle of a golf course. When I finally got to his house I inputted the correct coordinates into my unit.

When I returned home I went on the Navtec site to put in a correction only to find that the address as cited on their map was correct. Now either they corrected it before I was ready to send in the request or Garmin has very outdated 2008 maps or Garmin has a screwed up map. Most of the time Garmin is correct but now I go to Google Earth, or Navtec or to Virtual Earth to verify my destinations. I find this a pain and something that should be unnecessary but I get tired of showing up at the wrong place by being a "trusting soul". I guess my old NY skeptic attitude is coming back thanks to GPS.

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Nuvi 350 - North Carolina - I'm not a native Southerner but I got here as fast as I could!

.

It's important to remember that the routing never promises to deliver the best route. It's a simple mathematical calculation based upon whether you have "Fastest" or "Shortest" selected as the route preference and taking into account any avoidances set. Fastest takes into actual the speeds that the software has for the types of roads in the route. This may not be the actual fastest route depending on local conditions that the database doesn't know anything about. Shortest distance is what it says that it is. Usually shortest equal longer time because it uses local streets when they might not be the best choice. Also, the unit doesn't know anything about traffic (unless using a traffic receiver) or traffic lights. So, it won't take these into consideration. But just remember to think of it as a co-pilot not an auto-pilot.

Good line...

Motorcycle Mama wrote:

But just remember to think of it as a co-pilot not an auto-pilot.

I'm gonna have to use that one Motorcycle Mama!

auto pilot

ummm...I use it as an auto pilot if I am traveling and have no time restraints. I like to see the way it takes me and so far, it is never a lot more then what I would have chosen...20 minutes max on a 3 hr trip.

--
Charley - Nuvi 350 - Bel STI Driver - Cobra 29 w/ wilson 1000 - AIM: asianfire -

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Just don't complain about where it sends you. : )

And then there were 2..

Grandad-2003 wrote:

I will be traveling from Baton Rouge, LA to Georgetown, TX. So I just ran a get directions on Google, Mapquest, and Yahoo and compared to my Garmin suggested route (Map Version 2008). Three different results came up. Google and Mapquest agree, and the others are different. I am now wondering which route is the best to take.

Shortly after getting underway, the GPSr decided that the route recommended by Google/Mapquest was the better plan.. Which was what I had alredy decided to do anyway. (Intereting however that the departure from Georgetown to the main highway was slightly different it was for the inbound route.)

Also, the comments above which have a "be sure to use your brain" type theme are duely noted. The Version 2008 mapping software for I35 near Georgetown, TX, North of Austin, is in total need of rework. We found that many/most of the merge lanes onto/off-of this interstate are both missing and are also in places where there is no merge. One such would have merged off of a bridge. Also the crossover streets are not correct. The GPSr "assumed" we had missed the turn and was in the process of recalculating a new route (as we traveled over the median shown on the display).

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Randy C530, Nuvi 52

trust no one

gps routing is only IMO 70% trustworthy. Use your 2 dimensional navigation system (a folding map) or another source to always verify a final destination.

Ive found with gps's, you really get what you pay for when it comes to routing. The technology will get better in time (hopefully our lifetime).

A gps will always get you out of a jam if youre lost - it may not be the best route, but it will get you where you need to go. That is one of the reasons why I use it, not for the sole purpose of routing. I really use my gps for the other navigation features for when Im driving, ie overview of the area, distances and times, etc.

Yeah, pretty much the same

Yeah, pretty much the same here. I bought the GPS mainly to keep from getting hopelessly lost, which I have a penchant for doing. My C340 has however also found some new and interesting routes that vary the trip nicely. The trust factor is steadily increasing because she hasn't let me down too badly yet.

Got to remember

Got to remember this line by MM to use it on my wife when the GPS is slightly off course. Who am I to argue when she has a better sense of direction? After all, she has bought me 3 GPS's (first one stolen, second one re-allocated to my daughter, I'm going to weld my third one to my truck just in case.)

fairly recent construction

Grandad-2003 wrote:
Grandad-2003 wrote:

I will be traveling from Baton Rouge, LA to Georgetown, TX. So I just ran a get directions on Google, Mapquest, and Yahoo and compared to my Garmin suggested route (Map Version 2008). Three different results came up. Google and Mapquest agree, and the others are different. I am now wondering which route is the best to take.

Shortly after getting underway, the GPSr decided that the route recommended by Google/Mapquest was the better plan.. Which was what I had alredy decided to do anyway. (Intereting however that the departure from Georgetown to the main highway was slightly different it was for the inbound route.)

Also, the comments above which have a "be sure to use your brain" type theme are duely noted. The Version 2008 mapping software for I35 near Georgetown, TX, North of Austin, is in total need of rework. We found that many/most of the merge lanes onto/off-of this interstate are both missing and are also in places where there is no merge. One such would have merged off of a bridge. Also the crossover streets are not correct. The GPSr "assumed" we had missed the turn and was in the process of recalculating a new route (as we traveled over the median shown on the display).

Georgetown / Round Rock / Austin area
love the road construction.

This is always a problem. Recently completed construction and maps are always a couple of years behind. Just another reason to keep the human common sense and better judgement switches to ON.

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........Garmin StreetPilot c550 / Nüvi 765...........

road changes

There should be a national bureau that forces ALL road construction work to be entered into a national database. A road crew that doesnt comply should be hit with a shovel. Its easy enuff todo, it just costs moolah. I hope someday it happens in our lifetime. Im writing my senator now...

I agreed to that.

A New Commitee ?

wongman1 wrote:

There should be a national bureau that forces ALL road construction work to be entered into a national database.

And then what?

You want our NATIONAL GOVERNMENT to start up another Bureaucratic Monster.

Nothing they have ever gotten themselves involved in ever turned out right. They seem to never think ahead to those UNINTENDED CONSEQUENCES. Not only would it cost moolah but think triple that moolah to the 3rd power. and still nothing would be accomplished.

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"Those that stop and smell the roses, must realize that once in awhile you may get a whiff of fertilizer."..copyright:HDHannah1986 -Mercedes GPS - UCONNECT 430N Chrysler T&C - Nuvi 2598- Nuni2555 - Nuvi855 - Nuvi295W - Nuvi 750 - Ique 3600

Wongman--I couldn't agree more

wongman1 wrote:

A gps will always get you out of a jam if youre lost - it may not be the best route, but it will get you where you need to go. That is one of the reasons why I use it, not for the sole purpose of routing. I really use my gps for the other navigation features for when Im driving, ie overview of the area, distances and times, etc.

I couldn't agree more. I have found that Mapquest has much better routes to Washington, DC, for anyone driving in any normal (moderate to heavy) traffic. Perhaps if I were driving at 3:30 in the morning my nuvi would save me two minutes on a 40-minute ride, but I tried two different Garmin-suggested routes this week and spent a lot of extra time following small, overcrowded roads. BUT THIS IS NOT A COMPLAINT. REALLY. I just know now that I need to rely on my experience with the DC routes more than on my GPS. Without trying the nuvi, I would not have known it.

More importantly, the nuvi has been a big help in the past week too. On two occasions going home, I faced bad traffic, once due to a major accident. On both occasions, I enabled my nuvi to avoid major roads, jumped off the highway (DC Beltway approaching 270 from the south) and got directions that I would not have found on my own. On these occasions, I certainly saved time by finding an alternative to the fastest route that Mapquest had given.

The moral of the story: Having a GPS inside the car doesn't mean leaving your brain outside it.

h hannahs good points...

good points..
howabaout a privately funded bureau - say by Garmin, magellan, mapquest, etc that creates, manages and funds the project while its government enforced?

maybe senator obama or clinton may back this up? Im writing a letter to them now...

Potholes

I'm just thinking about the time spent entering that info for each and every pothole I see the crews repairing. They are only blocking one lane for about 1/4 mile for each one and are moving the block consistently.

I know most states do have major road construction listed on their own state's Dept of Transportation site.

I usually check the states I'm going to before I leave and get a quick idea.

Maybe I should compile a quick list of all the DOT sites...hmmm, a project perhaps?

my nuvi saved me too

ya
my nuvi saved me a few times already and rescued me from my infamous shortcuts.

it already has paid for itself by saving me gas and my chargable time.

One of the best investments and peace of mind items ive ever bought. cant wait till the technology gets better.

potholes follow up

good idea on the DOTs

ok.. well maybe a database for road changes/additions/deletions...

not so much for repairs....i could see that being a nightmare to manage and keep updated...