Državna cesta D546 is situated in the border region between Slovenia and Croatia, running in close proximity to the towns of Samobor and Brežice. The road skirts the edge of Park prirode Žumberak – Samoborsko gorje, a protected area known for its diverse flora, karst landscapes, and traditional rural settlements. The route is accessible from both the Slovenian and Croatian sides, with Samobor located approximately 4.8 km (3 miles) from the starting point and Brežice about 7.4 km (4.6 miles) from the endpoint. An interactive map showing the road can be found at the end of the article.

The D546 is an asphalt road with a moderate degree of curviness, making it suitable for riders seeking a balanced experience between straight sections and gently winding turns. The surface quality is generally good, though not exceptional, providing a comfortable ride for most motorcycles. The road stretches for approximately 12.6 km (7.8 miles), with the majority (about 52%) being wide enough for two vehicles to pass comfortably, while a smaller portion (about 45%) is single-lane. Riders will encounter a mix of road widths, with the widest sections comprising just over half the route. Elevation varies from 149 m (489 ft) to 486 m (1,594 ft), offering occasional panoramic views of the surrounding hills and valleys. The route passes through inhabited areas for roughly 29% of its length, so caution is advised in these segments due to potential pedestrian and local traffic.

One of the defining features of this road is its proximity to Žumberak – Samoborsko gorje Nature Park. The park is renowned for its biodiversity, traditional villages, and hiking trails. While the D546 does not traverse the park’s core, it skirts its boundaries, providing access to several trailheads and viewpoints. Motorcyclists interested in exploring the park further can find information on attractions such as the Samobor Castle and the rural landscapes of Žumberak. The road’s location makes it a practical choice for riders wishing to combine a day’s ride with visits to natural and cultural sites in the region.

There are currently no permanent closures for motorcycles on Državna cesta D546. However, as the road passes near a protected area, temporary restrictions may be imposed during certain events or adverse weather conditions. The region can experience snowfall and icy conditions in winter, which may lead to temporary closures or hazardous riding surfaces. Riders are advised to check local traffic updates and weather forecasts before planning their journey. No regular event-related closures have been reported, but it is prudent to consult the official websites of Slovenian police or Croatian police for the latest information.

At present, there are no tolls or entrance fees required to ride Državna cesta D546. The road is publicly accessible, and no special permits are needed for motorcycles. However, toll conditions may change in the future, especially if new regulations are introduced for roads passing near protected areas. For up-to-date information on road tolls and entrance fees in Slovenia, riders can consult the DARS website. For Croatia, information is available on the Hrvatske autoceste website. It is recommended to verify current conditions before setting out, particularly if planning to cross the border or enter the nature park itself.