An Open Access Journal
From: The evaluation of safety efficiency of non-urban infrastructure improvements; a case-study
Type of infrastructure improvement (#) | Injury accidents | Severe accidents | Total accidents |
---|---|---|---|
At junctions | |||
Building a roundabout (9) | −52 % [−71 %; −21 %] | -- | Reduction trend, ns |
Traffic lights' installation (14) | −29 % [−49 %; −2 %] | -- | +46 % [+17 %; +81 %] |
Minor geometric realignment at a signalized junction (26) | No change | No change | +13 % [+2 %; +25 %] |
Signing arrangement at junction (4) | No change | -- | −36 % [−52 %; −16 %] |
Replacing lenses by LEDs, at a signalized junction (11) | Reduction trend, ns | -- | Increasing trend, ns |
Resurfacing junction and replacing lenses by LEDs (3) | Increasing trend, ns | -- | Increasing trend, ns |
Resurfacing and barrier treatments at a signalized junction (7) | −20 % [−38 %; +2 %]* | Reduction trend, ns | −19 % [−28 %; −9 %] |
Shoulder treatments and replacing lenses by LEDs (2) | No change | -- | Increasing trend, ns |
Changes in traffic signal program and replacing lenses by LEDs, at a signalized junction (2) | -- | -- | Increasing trend, ns |
Crosswalks' arrangement and signing treatment, at a signalized junction (1) | Reduction trend, ns | -- | Increasing trend, ns |
Barrier treatments, at a signalized junction (9) | −28 % [−43 %; −9 %] | Reduction trend, ns | −11 % [−20 %; 0 %]* |
Pavement treatments, at a signalized junction (2) | −50 % [−68 %; −20 %] | Reduction trend, ns | −25 % [−44 %; +2 %]* |
Installing pedestrian fences and replacing lenses by LEDs, at a signalized junction (1) | Reduction trend, ns | -- | Increasing trend, ns |
On interchanges | |||
Realignment of junction on the interchange (1) | -- | -- | Increasing trend, ns |
Building roundabouts on the interchange (1) | −72 % [−92 %; −5 %] | -- | Reduction trend, ns |
Barrier treatments (2) | Increasing trend, ns | -- | −28 % [−42 %; −10 %] |
Traffic signal installation at a junction (1) | Reduction trend, ns | -- | Reduction trend, ns |
Ramps' resurfacing (4) | −23 % [−38 %; −5 %] | Reduction trend, ns | Increasing trend, ns |