Crossing a driveway can connect otherwise separate lawn zones, but loose gravel is more difficult than smooth pavement. Surface depth, stone size, grade, and mower traction all matter.
The practical answer
A firm compacted gravel strip may be traversable for some mowers, while deep loose stone can cause wheel spin or allow rocks to contact the deck. The route should be treated as transit, not a mowing area.
The constraint that matters most
Even if the mower can physically cross once, repeated autonomous crossings need to be reliable in both directions and after rain or vehicle traffic changes the surface.
How to set the mower up for it
Create a narrow mapped transit corridor, test repeatedly under supervision, and keep blades away from loose stone according to the manufacturer guidance. Use a hard crossing strip if reliability is poor.
How we research robot mowers
We normalize manufacturer specifications around the buying constraints that actually change the decision: recommended mowing area, navigation architecture, slope capability, cutting-height range, obstacle sensing, charging behavior, multi-zone support, warranty, parts availability, and current pricing. We give more weight to property fit than to feature count.
Prices, specifications, firmware, and configuration-driven features can change. Check the current manufacturer page and local requirements before buying or installing equipment.