ALKA is the common brand for group of companies for producing and marketing of road passive safety and vehicle restraint systems, traffic noise control barriers and steel construction elements. The parent company Alka Sanayi Insaat ve Ticaret AS is the bigest CE labeled steel restraint system producer in turkey with its own hot-dip galvanizing plant. Alka is exporting vehicle restraint systems to Europe but mainly to Germany, Switzerland and Italy. Alka is a member of the German Quality Association of Steel Safety Barrier Manufacturers aimed to apply RAL-RG 620 quality assurance an as well as developing products conforming to the reference standard EN 1317-5