Határátkelők: Gradina — Kalotina, Mokranje — Bregovo, Rgotina — Vrska Csuka, Ribarci — Oltomanci, Vrška Čuka (SRB)...
03:37-kor a legrövidebb sor a Gradina — Kalotina átkelőnél (25 perc). A leghosszabb sor — Žeravino — Strezimirovci (25 perc).
Serbia → Bulgaria runs mainly through Gradina–Kalotina on the E80/A4. Queues are typically light to moderate (30 minutes to 2 hours). Tolls apply on both motorways. Serbian-registered vehicles can buy Bulgarian e-vignettes online before crossing to avoid border-area kiosks.