This information note, which is particularly directed at road operators, presents the characteristics of Temporary Portable Rumble Strips (TPRS), explains some of their use cases and possible layouts on carriageways, and lastly covers issues linked to installing and removing the systems. For scheduled operations (road works), lanes on roads with separate carriage­ways are closed using two methods of temporary signage: standard signage (signs placed on the ground, or signs that can be covered) or light-signals with light arrow systems for block vehicles. For about twelve years, road manag­ers have noted that the number of accidents in lane closure locations is tending to increase, particularly when light arrow systems for block vehicles are used. On France's road network, between 2014 and 2017, collisions with light arrow systems for block vehicles accounted for more than a third of accidents in work zones (351 out of 905 accidents). One of the main identified causes of these accidents is a lack of driver attention during the approach sequence before the road works. In this context, since 2015 the Interdepartmental directorate for roads in the North of France (DIRN) has been testing the use of removable alert strips or road work warning strips placed before the light arrow systems for block vehicles. In fact, these systems are used in other European countries (Switzerland, Germany, the Netherlands, the UK) and in North America, and referred to as "portable rumble strips". Based on these experiments, the Directorate-General for Infra­structure, Transport and Mobility (DGITM) within the French Ministry for Eco­logical and Inclusive Transition has authorised the use of such systems on roads with separate carriageways, via an Order dated 14 January 2020.