Garmin 1090 Route Issue
Planning a trip north going through Baltimore in a Class A. Garmin route takes me through the McHenry Tunnel, which I am too wide for. Max width in the tunnel is 8' and my MH is 8.5'. Called and talk...
Forum Discussion
aftergolf wrote:
What is the value of this device if I have to research every DOT site for where I am traveling?
To set up the unit the user has to enter vehicle info including height, width, weight etc and is supposed to keep you off of roads with lanes too narrow, bridges to low or underweight.
That is the entire premise of the device!
Your assumption is that ALL the roadway data that if filed or on file with DOT or whomever is (a) correct (b) up to date (c) truely reflects the roadway and (d) captures any other restrictions.
THAT is a BAD BAD BAD assumption. Often Much of that data is old, obsolete, incorrect, only partial data or NOT filed.
As I mentioned, the data the gps uses is what is filed by whomever is responsible for the road. If that data it is not correct or not filed, it's not the gps fault. It's the agencies fault for not having correct information on file that Navteq has access to.
As I mentioned earlier, that same garmin will say I can't go on SR14 in Washington or down 101 in oregon without routing around tunnels. That's because the ONLY data filed show edge clearance outside the traffic lane of around 9ft, NOT the clearance on the traffic lane of 14+ft. If I go to ODOT website it will show the clearance as 9ft. on many tunnels. Even though traffic lane clearance is listed before the tunnel as 14+ft and an edge clearance much less.
that's likely the issue you are seeing. BAD data from whomever is responsible. It may all that was on file was traffic lane width, not the other restrictions.
So does that tunnel prohibit duallys unloaded? they are over 8ft, so is my 3/4 ton unless I fold the mirrors against the body.
I took a look at a picture of the tunnel and the picture showed at least one vehicle in the tunnel over 8ft wide mirror to mirror, and the traffic lanes look to be the typical 12ft lane.
And here is a quote from the DOT on tunnel restrictions. 8.5 ft is perfectly legal according to this.
Any oversize vehicle and load together exceeding 14 feet 6 inches in height or 11 feet in width is prohibited from entering the I-95 Fort McHenry Tunnel and its approaches unless, in the case of vehicles and loads exceeding 11 feet in width, special written permission is obtained from the Administrator of the Tunnel.
