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Table 1 Part of a preliminary road inspection sheet (adapted from [25])

From: Integrated American-European protocol for safety interventions on existing two-lane rural roads

Macro-area

Item

Parameter

Indicator

Judgement (to be filled by the road inspector)

General features

CRITICAL WEATHER CONDITIONS

WEATHER (fog, wind, snow, rain)

Lack or insufficient advices to users

√

Inadequate countermeasures

√

ROAD PAVEMENT CONDITIONS (ice, water flooding, rubbles)

Lack or insufficient advices to users

√

Inadequate countermeasures

√

TRAFFIC

VOLUME

Inadequate cross-section

√

TYPE

Presence of specific components

√

SURROUNDING ENVIRONMENT

CLEAR ZONES

Presence of obstacles, dangers, service roads, etc.

√

CLEAR ZONES (OUT OF THE FENCES)

Presence of buildings, trees, etc

√

BEYOND CLEAR ZONES

Distraction for particular problems, other roads, etc.

√

SPEED

DESIGN SPEED - OPERATING SPEED

Excessive difference (+/−)

√

MAXIMUM POSTED SPEED - OPERATING SPEED

Excessive difference (+/−)

√

ROAD SIGNS

HORIZONTAL ROAD SIGNS

Not homogeneous

√

VERTICAL ROAD SIGNS

Not homogeneous

√

VARIABLE MESSAGE SIGNS

Ineffective information

√

Geometry

HORIZONTAL ALIGNMENT

TANGENTS

Excessive lengths

√

TRANSITION CURVES

Absence or Inadequate transition curves

√

CIRCOLAR CURVES

Inadequate radius of curvature

√

VERTICAL ALIGNMENT

SLOPES

Excessive slopes

√

Excessive lengths

√

CREST VERTICAL CURVES

Presence of crest vertical curves

√

SAG VERTICAL CURVES

Presence of sag vertical curves

√

PERCEPTION

PERCEPTION

Incorrect sight perception

√

Losing perception of road layout

√