When running the ADAS SLIF App, VBOX Touch can efficiently validate Speed Limit Information Function (SLIF) and Intelligent Speed Assist (ISA) systems. The app logs distance data and sign recognition inputs (OK/NOK), and calculates the True Positive Distance (TP_D - percentage of total distance where the displayed speed limit matches the road signs).
The VBOX Touch SLIF App uses a VBOX Touch unit to capture the primary input and a Video Data Logger to record data from both outside and inside the vehicle.
The app works with a simple button box. During testing, the driver compares the speed limit shown on the dashboard with the actual road speed limit.
If the values stop matching, the driver must press the black button to start recording a Not OK (NOK) distance. When the values match again, the driver must press the black button again to start the recording of an OK distance.
Key features include:
- Real-time compliance monitoring for displayed speed vs real-world signage (TP_D).
- Driving session tracking across urban, inter-urban, and highway conditions, day or night.
- Event logging with the SLIF Event Marker Box (RLACS348).
- Integration with VBOX HD2 (optional) for video and data overlays.
- CAN connectivity (DBC file needed) for broader test setups.
Download the app from the VBOX Automotive website.
For installation instructions, refer to the Installing or Updating an App article.
Version 1.0.1.69 – 17 February 2025
- Added Darkness parameters to CAN output (on, distance, percentage)
- Added ID 32B to allow VBOX Touch GNSS to be used as speed/position source in HD2
Version 1.0.0.59 – 14 January 2025
- First release
VBOX Touch CAN output is available for use with any other data logger or relevant equipment within a wider test setup.
Refer to the SLIF DBC file for more detailed information about the CAN signals, including scales and offsets.
| ID* | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0x401 | (1) Event | (2) NOK | (3) Rd Type | (4) D-on | Unused | (5) Road % Urban | (6) Road % InterUrban | (7) Road % Highway | (8) Test Total Distance | |||||||||||||||||||||||||||
| 0x402 | (9) Test Total Dist OK | (10) Test Total Dist NOK | ||||||||||||||||||||||||||||||||||
| 0x403 | (11) Test Total TPD | (12) Urban TPD | (13) InterUrban TPD | (14) Highway TPD | ||||||||||||||||||||||||||||||||
| 0x404 | (15) Urban Distance | (16) Urban Distance OK | ||||||||||||||||||||||||||||||||||
| 0x405 | (17) Urban Distance NOK | (18) InterUrban Distance | ||||||||||||||||||||||||||||||||||
| 0x406 | (19) InterUrban Distance OK | (20) InterUrban Distance NOK | ||||||||||||||||||||||||||||||||||
| 0x407 | (21) Highway Distance | (22) Highway Distance OK | ||||||||||||||||||||||||||||||||||
| 0x408 | (23) Highway Distance NOK | Reserved | ||||||||||||||||||||||||||||||||||
| 0x409 | (24) Darkness Distance | (25) Darkness % | Unused | |||||||||||||||||||||||||||||||||
- Event marker triggered
- Not OK state is active
- Road type (0=unknown, 1=urban, 2=inter-urban, 3=highway)
- Darkness condition active
- Urban driving percentage (%)
- Inter-urban driving percentage (%)
- Highway driving percentage (%)
- Total test distance in metres (m)
- Total test distance in OK state in metres (m)
- Total test distance in Not OK state in metres (m)
- Total TP_D performance (%)
- Urban TP_D (%)
- Inter-urban TP_D (%)
- Highway TP_D (%)
- Total urban distance in metres (m)
- Urban distance (OK state) in metres (m)
- Urban distance (Not OK state) in metres (m)
- Total Inter-urban distance in metres (m)
- Inter-urban distance (OK state) in metres (m)
- Inter-urban distance (Not OK state) in metres (m)
- Total highway distance in metres (m)
- Highway distance (OK state) in metres (m)
- Highway distance (Not OK state) in metres (m)
- Distance driven in darkness in metres (m)
- Percentage of distance driven in darkness (%)
The results will be updated live while a test is running.
The colour of the frame around a result indicates whether it is OK or NOK.
Results Screen 1 will automatically be displayed when you press the STOP TEST button.
This page displays a summary of the Distance, TP_D, TP_D Variance, Darkness % and Road %.
Use the arrow buttons at the top of the screen to navigate to Results Screen 2.
Results Screen 2 displays an overview of the performed test with Distance, TP_D, TP_D Variance, Darkness % and Road % values for each Road Type.
When you press the Settings button on the landing page, the app will display the Settings and Diagnostics screen. The Settings tab will be displayed by default.
Settings Tab
Brightness
The settings in this section control the brightness of the display and the LEDs.
The higher the value, the brighter the Display/LED is.
The Display Brightness options are: 1–5
The LED Brightness options are: 1–5
You can also disable the LEDs completely if required by setting the LEDs setting to Off.
Tap the buttons to cycle through the available options for each setting.
Application
This section is where you change the LED Mode for the application.
You have the following options:
- Persist
The LEDs will illuminate in the state colour when the state changes and will stay illuminated until the state changes again. - Flash
The LEDs will flash in the state colour when the state changes and will turn off until the state changes again.
Tap the button to toggle between the options.
GNSS
This section is where you adjust the number of GNSS Leap Seconds applied to the test. Tap the button to change the value.
Diagnostics Tab
Open the Diagnostics tab by tapping Diagnostics in the bottom right corner of the screen.
GNSS
This section provides information about the number of satellites being tracked from each constellation.
This is also where you find the Coldstart button.
Tap the Coldstart button to perform a GNSS coldstart on VBOX Touch.
A GNSS coldstart forces the GNSS engine to reset its downloaded almanac of current satellite positions, and may be required if:
- The GNSS engine locks up.
- The VBOX is struggling to acquire satellite lock.
NOTE
Constellation almanacs have information about orbit data and research on active GNSS satellites in the constellation.
Hardware/Application
This section displays the following information:
- Serial number
- Hardware code
- App version
- System version
- Active .vbo file
Tap the New Test button to open the Test Screen with a new test.
Tap the New Test button to open the Test Screen with a new test.
Tap the Continue Test button to open the Test Screen and resume the previous test.
Tap the Continue Test button to open the Test Screen and resume the previous test.
The SLIF App Test Screen displays the test data and an easy-to-read status indication.
Tap the STOP TEST button when a test is running to stop the test.
Tap the STOP TEST button when a test is running to stop the test.
The test must include runs under both daylight and darkness conditions. At least 15% of the total distance must be recorded in darkness.
By changing the Light Mode setting in the SLIF App, the app will record the distance for each Light Mode and calculate and display the percentage of the total distance that was recorded in darkness.
Tap the Light Mode button to toggle between daylight and darkness conditions.
The test must include runs under both daylight and darkness conditions. At least 15% of the total distance must be recorded in darkness.
By changing the Light Mode setting in the SLIF App, the app will record the distance for each Light Mode and calculate and display the percentage of the total distance that was recorded in darkness.
Tap the Light Mode button to toggle between daylight and darkness conditions.
NOTE
The icon on the Light Mode button and the display theme change depending on the selected mode.
- In Daylight mode, the button changes to a sun behind a cloud, and the display uses a white background with dark text.
- In Darkness mode, the button changes to a moon, and the display uses a black background with white text.
This area will display the total distance covered in the test so far.
This area will display the total distance covered in the test so far.
Select the Road Type you are driving on during the test:
- Urban
- Inter-Urban
- Highway
The button for the selected Road Type will change colour depending on the triggered state (refer to the Status Indicators section below).
Unselected Road Type buttons will remain grey.
Select the Road Type you are driving on during the test:
- Urban
- Inter-Urban
- Highway
The button for the selected Road Type will change colour depending on the triggered state (refer to the Status Indicators section below).
Unselected Road Type buttons will remain grey.
This section displays the Road Distance, Distance NOK and TP_D value for the selected Road Type.
This section displays the Road Distance, Distance NOK and TP_D value for the selected Road Type.
The SLIF App status indicators include LEDs and on-screen colour changes that reflect the current test state and event markers.
Depending on the recorded state or if an event has been marked, the following elements on the Test Screen will change to indicate the information currently being logged:
LEDs
Depending on the set LED behaviour in the settings, the LEDs above the display will do one of the following:
LED Mode - Persist
The LEDs will illuminate green when the state is OK and red when the state is NOK.
LED Mode - Flash
The LEDs will flash green when the state changes to OK and flash red when the state changes to NOK.
Event
The LEDs will flash red to indicate an event being marked
Section Frame - Road Type Distance and TP_D Value
The frame around the Road Type Distance and TP_D Value section on the Test Screen will change as follows:
- Green when the state is OK
- Red when the state is NOK
- Orange while an event is being marked
Selected Road Type Button
The colour of the selected Road Type button will be:
- Green when the state is OK
- Red when the state is NOK
- Orange while an event is being marked
Connect the equipment as illustrated below:
NOTE
If you are using a Video VBOX unit instead of VBOX Video HD2, the connections may be different. In most cases, you'll want to connect VBOX Touch to the CAN port on the Video VBOX.
- Tap the New Test button.
- Select the starting Road Type when prompted to start the test.
- Tap any unselected Road Type button at any time during the test to change the road type.
Toggle Between OK and NOK
Tap inside the border area on the Test Display or press the Black button on the button box to toggle between OK and NOK.
Mark Events
- Press the white button on the button box to start marking the event.
- Press the white button again to stop the event marking and return to the current OK/NOK state.
The test should be performed over a total distance of 400 km.
However, the test may be ended earlier if:
The total distance exceeds 300 km, and the performance value TP_D remains within ±5.0% over the final 50 km (calculated continuously)
The app begins monitoring the conditions for an early finish once the total distance reaches 250 km. If the required criteria are met, you will be given the option to end the test early.
Stop the test at any time by tapping the STOP TEST button.
When a test has been stopped, you can resume it by tapping the Continue Test button on the home screen.
IMPORTANT
Always stop the test before you remove an SD card or disconnect power from the test system.
After completing a test, load the test files from the media in both VBOX Touch and the Video Data Logger in VBOX Test Suite for post-test analysis.
