An Open Access Journal
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 | √ |