 Other actions it required to be taken is for all Dynamic Hard Shoulder Motorways to be converted into All-Lane-Running by March 2025, Stranded Vehicle Detection radars to be installed on all Smart Motorways within 36 months & a potential national programme to install more ERAs on current smart motorways.Early systems used dot matrix signs on gantries to display short text messages, with smaller variable signs above each lane and to the sides of the carriageway.Current smart motorway systems often use the "MS4" sign type  which can include pictograms from the Traffic Signs Regulations and General Directions.