What is UI-Signpost?

UI-Signpost is an an add-on program for G4IDE's UI-View APRS platform written by Andy Pritchard M0CYP.

Simply put, it monitors gps data from mobile's beacons from various locations as they pass through these locations. For example, K3QQN-9 beacons his position as he passes westbound through a stretch of I-264 near Brambleton Avenue in Norfolk. He travelling at 58 miles per hour. My station takes his direction of travel and speed and sends a "milepost" object with his information. The text frame would look like this on a home computer:

264W_X11 West Speed 58Mph Time 1800 I-264 west @ Brambleton Ave.
The translation for the above is this:


264W_X11 is the object created for this location. Interstate 264 west near exit 11.
West is the direction of travel.
Time 1800 is self explanatory.
I-264 @ Brambleton Ave is the text description of the object location.

Since I do not have a Kenwood D-700 or D7A, I do not know exactly what it looks like on those screens. If anyone can save a screen and send a pic to me via e-mail it would be appreciated.

Note that there is a one mile stretch of highway beyond a designated point where a mobile can trip the signpost. In the example above, K3QQN-9 can trigger the I-264 west @ Brambleton Avenue signpost anywhere on I-264 between Brambleon Avenue and the Berkley Bridge. Note also that this signpost is set so that only mobiles on I-264 westbound will trigger the signpost. Signpost can be set to trigger at any direction or a specific direction(s). A signpost can be set at a location BEFORE a known highway choke point to monitor speed appraching said choke point. A local example would be before a tunnel. I have signposts set to trigger only when a mobile beacons in the direction of a tunnel. Case in point if a mobile beacons on I-64 westbound in Norfolk @ 4th View St., 3 miles before the Hampton Roads
Bridge-Tunnel, UI-Signpost will send the object and text. However, another mobile beaconing eastbound leaving the tunnel on that same stretch will not trigger the signpost.

Below is a list of locations I've selected to monitor traffic:

Object Name Object Location Details
264E_X6I-264 east @ Des Moines Ave. Portsmouth approach to Downtown Tunnel
264W_X11I-264 @ Brambleton Ave.Norfolk approach to Downtown Tunnel
264E_X13I-264 east @ Military Hwy
264W_X15I-264 west before Newtown Rd.
564WI-564 west @ Terminal Blvd Toward Naval Station Norfolk
64E_X261I-64 @ Hampton Roads Center Pkwy.
64E_X263I-64 @ Mercury Blvd.Coliseum Central area
64W_X263I-64 @ Mercury Blvd.Coliseum Central area
64W_X265I-64 @ La Salle Ave.
64E_X267I-64 east @ Settlers Landing Rd. Hampton approach to Hampton Roads Bridge-Tunnel
64W_X270I-64 west @ 15th View St.Norfolk approach to Hampton Roads Bridge-Tunnel
64W_X273I-64 west @ 4th View St.HRBT traffic often backs up beyond here.
64W_X277I-64 west @ Tidewater Dr.1 mile before I-564 split to Naval Base
64E_X284I-64 east @ Lake Taylor1 mile before the named exit with I-264, known as "the interchange".
Compass direction is south but is still east bound.
64W_X284I-64 west @ Twin Bridges1 mile before named exit with I-264, known as "the interchange".
Compass direction is north but is still west bound.
64E_X286I-64 east before Indian River Rd. Compass direction is south but is still east bound.
64W_X286I-64 west before Indian River Rd. Compass direction is north but is still west bound.
64E_X289 I-64 east @ Greenbrier Pkwy. Compass direction is west but is still east bound.
64W_X289I-64 west @ Greenbrier Pkwy. Compass direction is east but is still west bound.
64E_X290I-64 east @ Battlefield Blvd.Compass direction is west but is still east bound.
64W_X290I-64 west @ Battlefield BlvdCompass direction is east but is still west bound.
64E_HRBI-64 east @ High Rise Bridge.Compass direction is west but is still east bound.
64W_HRBI-64 west @ High Rise Bridge.Compass direction is east but is still west bound.
464N_X5I-464 north @ South Main St. Chesapeake approach to Downtown Tunnel/Berkley Bridge
664N_X2I-664 north @ Powhatan Pkwy1 mile before I-64 in Hampton
664S_X6I-664 south @ 26th St.Last exit before Monitor-Merrimack Memorial Bridge-Tunnel in Newport News
664N_X8I-664 north @ College Dr.Last exit before Monitor-Merrimack Memorial Bridge-Tunnel in Suffolk
664S_X12I-664 @ Dock Landing Rd.
PINNERSPortsmouth approach to Midtown Tunnel
W_GHENTHampton Blvd @ W 21st Stin the West Ghent section of Norfolk, only southbound traffic on Hampton Blvd. south of W 21st St will trigger this signpost.

Others may be added later.

WB4APR has been running his own traffic monitoring program, APRStfc (APRSdos) from the U.S. Naval Academy (W3ADO-14) station in Annapolis. His system monitors the Annapolis/DC/Baltimore metro area. See his page, "APRS Traffic Speed Monitoring" on his system and how he'd like to link up with the Maryland traffic monitoring system.

Home