One-tap dark mode
from the assessment header — switch before the cab goes dark and the choice stays for the rest of the session.
Included as standard
Assess in the cab without lighting up the windscreen
A bright tablet in a dark cab is a distraction — for the driver and for the assessor. Tunnel Mode is the assessor switching dark mode on and dimming the screen on mobile or tablet. It does not detect the tunnel automatically; the person in the cab decides when the glass is too bright.
Tunnel Mode
Dark and dimmable for the cab
A bright tablet against a dark windscreen is a distraction. When you enter a tunnel, the assessor switches assessing to dark mode and can dim the screen further on mobile or tablet — glare drops, and the focus stays on the railway.
- One-tap dark mode from the assessment header — switched by the assessor, not by the device.
- Dimmable brightness on mobile and tablet, adjusted by hand to suit the cab.
- Cab safety notice at the start of an event that offers dark mode in one tap.
Dark mode and brightness are set by the assessor on the tablet — the device does not switch automatically when the cab goes dark.
Built for the cab, not the office
When an assessment starts, Rail Intel reminds assessors that windscreen reflections matter, especially through tunnels, and offers dark mode in one tap. The Dark / Light control sits in the assessment header, so switching never means leaving the flow.
On mobile and tablet, a brightness slider sits under the header. Dim the screen from full daylight down to a soft cab-friendly level, and reset it when you are out of the tunnel. Both controls are manual: the tablet does not read the ambient light and switch on its own.
Dimmable brightness
on mobile and tablet, from 40% up to 135%, adjusted by hand to suit cab conditions — not auto-detected.
Cab safety notice
at the start of an assessable event, with a direct Turn on dark mode action when windscreen glare matters.
App-wide dark theme
from the user menu when you are not assessing — the same dark palette across the whole app.
Frequently asked questions
Does Tunnel Mode detect tunnels automatically?
No. The assessor switches dark mode and adjusts brightness manually — designed for the person in the cab to decide when glare is a problem.
Which devices support brightness control?
Mobile and tablet assessments include a brightness slider under the header, from full daylight down to a cab-friendly level.
Do assessors need to change device settings?
No. When an assessment starts on a mobile or tablet, Rail Intel prompts the assessor to switch to dark mode in the app — there is no need to open the device settings. A brightness slider under the assessment header lets them dim the screen further, to the level they need, without leaving the assessment.
Why don't I see the cab safety warning on my laptop?
The cab safety notice is shown at the start of an assessment on mobile and tablet only. Rail Intel surfaces it when you are assessing in the cab on a portable device, where windscreen glare from a bright screen is a genuine risk. Most assessors complete in-cab work on a tablet; laptop assessments, which are usually done away from the cab, do not trigger the prompt.
Is Tunnel Mode a paid add-on?
No. Tunnel Mode is included in core Rail Intel at no extra cost. Safety-related assessment features are part of the standard platform — we do not charge separately for tools that help assessors work safely in the cab.