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Mobile retroreflectometer for road markings LTL-M

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Mobile retroreflectometer for road markings LTL-M
Specifications
Area Measured: 1000mm wide
Battery: 12V from the car network
Measurement range, cd m-2lk-1: 0 ... 2000
Processing unit dimensions: 400 x 170 x 200 mm
Measurement unit dimensions: 500 x 180 x 200 mm
PC Dimensions: 290 x 180 x 15 mm
Weight of the processing block: 8 kg
Unit weight: 12.5 kg
PC Weight: 1 kg

Manufacturer: Delta

LTL-M measures all types of road markings at a simulated distance of 30 m with the highest level of accuracy. LTL-M is used mounted on a vehicle measuring retroreflection at traffic speed, providing full overview of the condition of the road markings. The instrument operates with an accuracy of typically +/- 5 % and a repeatability of typically of +/- 3 %, which is in line with DELTA’s hand-held retroreflectometers LTL-2000, LTL-X Mark II, and LTL-XL.

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Use

LTL-M measures all types of road markings at a simulated distance of 30 m with the highest level of accuracy. LTL-M is used mounted on a vehicle measuring retroreflection at traffic speed, providing full overview of the condition of the road markings. The instrument operates with an accuracy of typically +/- 5 % and a repeatability of typically of +/- 3 %, which is in line with DELTA’s hand-held retroreflectometers LTL-2000, LTL-X Mark II, and LTL-XL.

LTL-M is a robust, reliable and advanced instrument designed for professionals using modern digital camera and illumination technology and data presentation in real time. This technology results in high measurement accuracy independent of changes in the geometry of the system caused by vehicle bouncing during driving.


LTL-M, the DELTA mobile retroreflectometer for measuring night visibility (RL) of pavement markings at traffic speed, is a new generation of mobile systems – and has already achieved a significant market penetration. The system solution outperforms other similar systems by offering better and more sophisticated solutions to mobile retroreflective measurements, including night visibility RL, daylight contrast, marking width, road stud (RRPMs) presence, etc.

Retroreflectivity measurements can be acquired at normal traffic speed, and during day or night at the user’s preference, hence avoiding dangerous incidents, where an operator must make handheld measurements in a busy road. Over 3,000 kilometers of road can be measured in a normal working week.

A viewing field of 1×1 m2 makes it easy for a driver to cover a line.

LTL-M measures RL (nighttime visibility) under dry conditions, daylight contrast as well as records line geometry and missing or non-working road studs (RRPMs). LTL-M measures white and yellow road markings up to 25 mm/1 inch in profile depth with no adjustments necessary. Calibration and change of light source can be done with a simple operation in the field. LTL-M comes with GPS and can be delivered with DMI (Distance Measuring Instrument) and an overhead camera. GPS makes it possible to determine exactly where specific measurements have been carried out. A DMI unit ensures correct distance measures if GPS contact cannot be established. An overhead camera supports additional visual inspection of problem areas when data are reviewed. Measurement data, GPS data and other recorded data will be automatically stored. The system gives the driver the option of marking incidents during operation in the log as well as inform about possible problems and malfunctions. 

Features 

  • Continuous measurement of night time visibility (RL ) of road markings at driving speed
  • Automatic compensation for vehicle movements (Patented)
  • Measures daylight contrast and line geometry
  • Measures presence of road studs (RRPMs)
  • Measures all types of plain and profiled markings
  • Measures retroreflection of white and yellow markings
  • Measures dry markings · Measures profiles up to 25 mm / 1 in
  • Stop and mark function during operation
  • Measured data are automatically stored
  • Multilingual menu
  • Can be operated by one person
  • Software for reporting and transfer of data to MS-Excel
  • Data presentation on Google Earth
  • Future software upgrades can easily be integrated


Standard delivery

  1. LTL-M retroreflectometer system (sensor, processor, user interface tablet PC with hybrid cable)
  2. GPS
  3. Transportation boxes on wheels
  4. Software for data presentation
  5. Calibration standard with DANAK certificate and alignment board
  6. Vehicle fixture (2 sets)
  7. User manual and quick guide
  8. Spare window glasses and gaskets
  9. Tablet PC windscreen holder
  10. USB ethernet adapter for remote service
  11. 8 m measurement tape



Options

  1. Overhead video camera
  2. DMI (Distance Measurement Instrument)
Manufacturer
Manufacturer Delta
Technical specifications
Range (cd·lx-1 ·m-²) 0...2000
Measured area Width 1000 mm
Horizontal aperture of lighting 0.17°
The aperture of the lighting of the observation 0,17°
Vertical aperture of lighting 0,33°
Working conditions 0°C … +45°C
Storage conditions -15°C … +55°C
Storage battery 12 В from car network
Dimensions and weight of the measuring unit 500 х 180 х 200 mm, 12,5 kg
Tablet PC dimensions and weight 290 х 180 х 15 mm, 1 kg
Dimensions and weight of the processing unit 400 х 170 х 200 mm, 8 kg