PT Journal AU Leso, M Kacar, L TI Issues of safety of autonomous railway operation at the GoA3 and GoA4 level SO Transactions on Transport Sciences PY 2025 BP 10 EP 15 VL 16 IS 3 DI 10.5507/tots.2025.011 DE Automatic train operation (ATO); Grade of automation (GoA); rail transport AB This contribution discusses the issue of approaching safety issues for newly introduced autonomous rail vehicle operation systems with the GoA3/GoA4 automation level. In particular, the paper discusses the issue of normative requirements for establishing and demonstrating safety requirements that are in place today for railway systems. The paper seeks to define the minimum criteria or processes that should be met and demonstrated in order for autonomous train operation to be accepted as sufficiently safe for commercial operation. ER