Border crossings: Gradina — Kalotina, Mokranje — Bregovo, Rgotina — Vrashka Chuka, Ribarci — Oltomantsi, Vrška Čuka (SRB)...
As of 19:44 the shortest queue is at Gradina — Kalotina (20 min). The longest queue is at Vrška Čuka (SRB) (25 min).
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.