| Visible image sensors |
- Present mainstream sensor in wide use
- System can be installed to use existing visible image cameras
- Moderately priced
- High resolution, detection accuracy is good
- Non-contact sensor capable of measurement over relatively wide range
- Their images have high visibility and they are also usable as monitoring screens
(Can provide video images. Can also record.)
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| Laser radar sensors |
- Easily made compact
- Not affected by the environment
(capable of continuous day and night operation)
- Moderately priced
- Measurement resolution can be set relatively freely, and detection accuracy is good
- Non-contact sensor that measures area directly below itself
- Can measure irregularities in the road surface, can be used as a road management sensor
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| Electric wave radiometer |
- All-weather sensor that can be used day and night without being affected by bad weather because it uses milliwave in the 95 GHz band.
- Passive sensor like the visible image camera
- Area road surface measurement by sensor head scanning
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| Optical fiber sensors |
- Capable of tracking road surface conditions over wide area
- Capable of continuous measurement day and night (not affected by weather)
- Capable of measuring road surface temperature distribution in the direction of travel as required for road management
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