A New Method Based on Field Strength for Road Infrastructure Risk Assessment

Table 7

Risk levels of road infrastructure (case study).

Risk level	Field strength	Explanation
No risk	E<60	The infrastructure is good enough for safe driving.
Low risk	60⩽E<100	The infrastructure is safe for most drivers, but it is risky for a small part of drivers in harsh weather.
Medium risk	100⩽E<140	The infrastructure is quite safe under normal condition, but it is risky for a large part of drivers in harsh weather.
High risk	E⩾140	The infrastructure is risky for most drivers, and it may lead to severe traffic problem.