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. 2009 Jul 28;9(8):5968–5988. doi: 10.3390/s90805968

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© 2009 by the authors; licensee MDPI, Basel, Switzerland

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 11. — S3 in real school zones. (a) 4 T-Sensor-p nodes and 2 T-Senor-v nodes. (b) 4 T-Sensor-v nodes in two lanes. (c) Speed camera (blue circle) and T-Act-s (red rectangle). (d) T-BS (blue rectangle) and loud speakers (red circle). (e) VMS is notifying that the speed limit is 30 km/h and the current measured speed is 21 km/h (in green), 44 km/h and 49 km/h (in red).