It is required by Law, like the warning triangle, requirements are different in different countries, some mandate also a first-aid kit and/or a fire extinguishe

It is required by Law, like the warning triangle, requirements are different in different countries, some mandate also a first-aid kit and/or a fire extinguisher: https://trip.studentnews.eu/s/4086/77076-Safety-equipment-for-cars-and-bikes-in-Europe.htm https://trip.studentnews.eu/s/4086/77076-Safety-equipment-fo... Lots of people keep the hi-vis vest together with the triangle/spare wheel, etc. in the trunk, but in theory these high-vis vest should be put on as soon as you get off the vehicle, so a better place is the glove box or (even better if available) the pockets on the rear of fronts seats.