Lane discriminating traffic counting device
US5360953A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Jul 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A traffic counting cord has a plurality of sections designed to be identical in physical characteristics, set-up procedures, durability and performance as a road tube. Each section has a portion with conductive upper and lower members and a portion with non-conductive upper and lower members. The upper and lower members are separated by resilient, non-conductive material. Embedded within the members are a plurality of wires insulated with nylon or other material and at least one non-insulated wire which is in contact with the conductive member. A count occurs when traffic impacting the cord causes the upper and lower members of a section to make contact. Individual counts for each lane can be obtained by cross-wiring the sections, so that the uninsulated conductors of each section are routed to a counter through insulated conductors or wires of the other sections. Any even or odd number of lanes, typically four, six, or eight lanes can be accommodated, although there is no theoretical limit. An alternative embodiment replaces the wires with resilient conductive material channeled through the cord to improve reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.