Nafplio, Argos, and Tolo now default to 30 km/h in built-up areas unless posted otherwise, while rural roads remain 90 km/h and motorways 120 km/h. Under Law 5209/2025 Article 20, the former blanket 50 km/h urban rule no longer applies, so drivers need to read signs on Asklipiou Avenue, Akti Miaouli, Bouboulinas, and Syngrou 8 rather than assume a city-wide standard. The most relevant enforcement data for the Peloponnese comes from the Hellenic Police, which reported 2,900 dangerous traffic violations in one month in September 2025, including 1,656 excessive-speed cases, and this matters on the Nafplio–Mycenae side roads near Tiryns, Karathona, and the EO Argous–Nafpliou corridor. For route planning, a visitor driving from Athens usually meets Elefsina on Olympia Odos, then Isthmos, and for the Moreas route to Nemea the Spathovouni toll can raise the total range from €4.60 to €7.55 instead of the incorrect €10.10 figure sometimes repeated online.