Spanish, Italian, and French drivers face fines for not adhering to specific road rules in each country.

Drivers warned about little-known European road rules, potential fines; motoring expert advises checking local laws in each country. Spanish drivers must refrain from honking horns unless in case of emergency, risking fines up to €100. Italian drivers need to display parking disc in Blue Zones, avoiding fines from £21 to £85. French drivers must display emissions stickers in clean air zones.