Which maintenance challenge was primarily responsible for the decline of Roman road network's integrity?

💡 Explanation

When rainwater drains improperly across an unpaved road, erosion occurs undermining the foundations because the water carries away supporting aggregate material leading to collapse. Therefore, long term erosion risks the structural integrity of the road, rather than spalling, subsidence or material fatigue which would involve distinct forces.

• Which factor primarily limited the potential productivity of chinampa agriculture for the Aztecs upon seasonal flooding?
• Which optical outcome arose in Alhazen's pinhole experiments when the aperture size increased beyond the diffraction limit?
• Which mechanism caused frequent clock stoppages in pendulum clocks before the invention of the Graham escapement?
• Which outcome occurs when wooden Roman palisade fortifications experience prolonged waterlogging?
• Which microstructure outcome resulted from quenching irregularities during early bronze tool production?
• Which mechanism facilitated the accurate measurement of time at sea using Harrison's marine chronometers?