Embodiments of the invention disclose a feature road section extraction method and
system and a dangerous road section judging method and
system. The extraction method comprises the following steps of: measuring a to-be-measured road by adoption of an
inertia measurement instrument, so as to
pose parameters, corresponding to each continuous sampling point of the to-be-measured road, acquired by the
inertia measurement instrument, wherein a mounting surface of the
inertia measurement instrument is parallel to a
road surface of the to-be-measured road, and the
pose parameters comprises a
pitch angle and a course angle; determining shape parameters included by the to-be-measured road according to the
pose parameters, wherein the shape parameters comprise a vertical curve
radius and a horizontal curve
radius; and extracting feature road sections included by the to-be-measured road according to the shape parameters of interval road sections included by the to-be-measured road, wherein the feature road sections comprise convex curve road sections, concave curve road sections, longitudinal slope road sections,
left curve road sections, right curve road sections and straight road sections.The extraction method is relatively high in efficiency and has relatively good stability.