Case 1: E-470 & Idris as the Automatic Vehicle Classification System
Client: E-470 Public Highway Authority
Application: AT700 Tolling – Retrofit to Manual Lanes
Background: E-470 in Denver, Colorado is 47 miles long and runs from I25 South of Denver to the new international airport and beyond linking to I25 in the North.
Project Detail: Prior to the introduction of Idris®, E-470 were using conventional technology to perform automatic vehicle classification (AVC) in their manual lanes consisting of a treadle, 4 foot light curtain and loop.
There were numerous problems with the system such as:
- Gooseneck (5th wheel) Violations
- System mis-classifications due to vehicle separator
- Issues with snowploughs
- Weather related issues due to snow/ice, deicer and dirt
Actual Gooseneck Misclassifications for Year 1 Annual Adjustments
| Plaza |
Goosenecks |
Toll rate |
Necessary Adjusted $ |
| A |
69,000 |
$1.50 |
$ 103,500.00 |
| B |
52,000 |
$1.75 |
$ 91,000.00 |
| C |
37,000 |
$1.75 |
$ 64,750.00 |
| D |
40,000 |
$1.75 |
$ 70,000.00 |
| E |
- |
$1.75 |
$ - |
| Total |
|
|
$ 329,250.00 |
When Plaza E was built, the decision was made to use Idris as the AVC system with the following benefits:
Auditing made easy – fewer exceptions to deal with.
- Ease of data review – easy to check back to see which was correct, the operator or the system.
- Elimination of light curtain maintenance costs
- Elimination of treadle maintenance costs
- Labour saving on cleaning of light curtain
Outcome: The results from Plaza E were so conclusive that making the case to bring forward the midlife upgrade for Plazas A-D by approximately two years was straightforward.
Conclusion: The argument for retro-fitting Idris to replace conventional technology can be made purely on financial grounds. Idris is the technology of choice for AVC in ALL types of toll lanes.
The Idris Technology is protected by one or more of the following patents:![]()
EP0879457, USA 6345228, 6483443 and 6337640
Registered Patents also include but not limited to European Countries, Brazil, Mexico, Canada & Australia.
Idris® is a registered trademark of Diamond Consulting Services Ltd.
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