vehicle classification
Idris say they aren't recommending deep loops for tolling yet CORRECTION
Posted Wed, 2008-04-16 20:07Teri England at Idris says the company is not recommending their smart loops be placed at 50mm (2 inches) for tolling purposes because for the moment they don't achieve the required 99.5% classification accuracy for toll collection. Teri England of Idris says the company is working to achieve these accuracies at 50mm (2 inch depth) but isn't there yet. She says there is a demand for loops that can be placed at this depth so they aren't chewed up in milling operations when the wearing surface of asphalt pavement is relaid - which occurs about every eight to twelve years. 180 words read more »
Idris loops going deeper - vehicle classification for open road tolling CORRECTION
Posted Fri, 2008-04-11 12:22
Idris loops, now a mainstay of highspeed automatic vehicle classification on US tollroads can now be placed deeper in the pavement, the licensing company says. At the previously specified depth of 20mm (under an inch) this has meant that pavement milling operations, undertaken every eight or ten years, are likely to chew up the loops.
520 words read more »
Complex toll classification during multi-modal period on roads 100 years ago
Posted Sun, 2007-12-16 18:34Early in the 20th century when muscle and motor power modes coexisted on the roads vehicle classification at toll facilities was complex. That is nicely displayed in this photograph of a posted toll schedule. 
The black and white photograph from the Library of Congress collection is rather overexposed or else the print has faded. But fiddling with it in Photoshop (taking Contrast up to about 130) it becomes more or less legible:
TARIFF OF TOLL RATES
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Vehicle classification problems
Posted Sat, 1999-10-09 20:45Vehicle classification problems
Originally published in issue 43 of Tollroads Newsletter, which came out in Oct 1999.
Page:7
Subjects:vehicle classification AVC
Facilities:Oklahoma Turnpike
Agencies:OTA
Locations:OK France
E-toll problems on Carquinez bridge CA
Posted Wed, 1996-11-20 19:00E-toll problems on Carquinez bridge CA
Originally published in issue 9 of Tollroads Newsletter, which came out in Nov 1996.
Page:6
Subjects:problems with vehicle classification ET
Facilities:Carquinez Bridge
Agencies:Caltrans
Locations:CA
E-problems on Carquinez bridge CA 1077 words read more »
