In 2016 the Ethos Active Mobility system was installed in the tunnel to monitor and actively manage tunnel usage. The system uses computer vision to count and measure the speed of bicycles and pedestrians, and displays messages on electronic signs to encourage considerate behaviour. The system has also been installed in the Greenwich foot tunnel and aims to make urban shared spaces safer and more pleasant to use for all. The system displays two messages - "No cycling allowed" (in red text) during busy periods, and "Please consider pedestrians" (in green text) during quiet periods.