Q:
What is TravTime™ used for?
A: To efficiently conduct GPS-based travel time, speed,
and delay studies.
Product information.
Q: Why is TravTime™ more efficient, cheaper,
safer, and more accurate than other methods?
A: Only one person is needed in the vehicle, reducing
data collection labor needs. Each driver has minimal
involvement with the GPS device, leaving him or her free
to concentrate on driving and the surrounding
conditions. Automated GPS and GIS methods are much more
efficient and accurate than manual data collection and
processing techniques.
Q: Do I need a specialized device to collect GPS data for TravTime™?
A: No, any GPS device capable to logging GPS
points or NMEA sentences can be used to collect GPS data
for TravTime™. However we suggest that you use the
GeoLogger™
to fulfill your GPS data collection needs.
Q: Can I use my existing GIS data with
TravTime™?
A: Yes, TravTime™ lets you load ESRI Shapefiles
and popular raster formats (MrSID , JPEG, BMP, TIFF, and
geoTIFF). Thematic maps of the data can be created and
exported to report documents.
Q: Does TravTime™ match the GPS data to a road
network?
A: Yes, TravTime™ lets you create a system of
link-based or points-based routes using a GIS interface.
All the editing tools needed to create and edit routes
are integrated in the TravTime™ user interface. Route
editing includes a ‘gap-filling’ routine that makes the
creation of link-based routes quick and easy. Users can
also create ‘checkpoints’ along a route that represent
controlled intersections.
Q: How automated is the processing of GPS data
into runs and statistics?
A: As automated as you would like. TravTime™
makes extensive use of clever spatial computations to
automatically segment GPS data points according to your
defined routes. These segments can then be automatically
assigned to routes and grouped into scenarios and time
of day groups (TOD) for easy comparisons. At the same
time, all of these automated procedures can be performed manually for full control of the process.
Q: What statistics does TravTime™ generate?
A: TravTime™ generates statistics by run, route
or road segment. The following selected statistics are
provided for these elements:
- Minimum, Maximum, Standard Deviation, and Average Travel Time
- Average Speed
- Average Number of Stops
- Average Stopped Time
- Average Congested Time
- Level of Service (if street classification is provided by the
user)
Q: Does TravTime™ compute level of service
(LOS)?
A: Yes, calculations and procedures conform to
the Highway Capacity Manual (HCM) and the Institute of
Transportation Engineers (ITE) Manual of Transportation
Engineering Studies.
Q: Does TravTime™ compute intersection delay?
A: Yes, checkpoints can be used to represent
intersections or other points of interest. TravTime™
automatically computes approach delay for these
checkpoints, delay components include:
- Control Delay
- Approach Delay
- Stop Delay
Q: What graphs does TravTime™ generate?
A: The types of graphs available in TravTime™ are: speed
vs. distance and distance vs. time. Graphs can be copied
and pasted into other Windows™ applications as well as
exported into .csv files in a format ready to be plotted
in your favorite spreadsheet/graphing application.
Q: Can I export the results into other
GIS/analysis programs?
A: Yes, using TravTime™ you can export the
result statistics to standard format files (.dbf, .csv
and .mdb). You can also copy the contents of any of the
reports into the clipboard for easy pasting into any
Windows™ program. TravTime™ can also export raw and
processed GPS data and routes to ESRI shape files.
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