An Open Access Journal
Table 1 Descriptive statistics of the study database on road sections*
From: A comparative evaluation of the safety performance of bus priority route configurations
Characteristic (variable in the models) | Statistics: categories with percent distribution; mean and sd for numeric values; for accidents—frequencies per site with percent distribution |
|---|---|
Type of BPR configuration (BPR type) | (1) curbside—66%, (2) open center-lane—20%, (3) barrier-separated central—14% |
Type of area combined with number of lanes for general traffic (Area) | (0) urban, 1 lane—14.6%, (1) urban, 2–3 lanes—74.7%, (2) suburban, 2–3 lanes—10.7% |
Year of accident occurrences (Year) | (1) 2010—24%, (2) 2011—24%, (3) 2012—26%, (4) 2013—26% |
Section length, km (offset in the models) | Mean 0.33, sd 0.30, min 0.05, max 2.02 |
Vehicle traffic, in ten thousands (V_veh) | Mean 3.8, sd 1.5, min 1.2, max 7.8 |
Categories of vehicle traffic, in ten thousands (Cat_veh) | (1) up to 2–14%, (2) between 2–3–16%, (3) between 3–4–30%, (4) over 4–40% |
Bus traffic, in thousands (V_bus) | Mean 1.6, sd 0.5, min 0.4, max 2.5 |
Categories of bus traffic, in thousands (Cat_bus) | (1) up to 1–18%, (2) between 1–1.5–26%, (3) between 1.5–2–24%, (4) over 2–31% |
Total injury accidents | 0–85.1%, 1–8.1%, 2–3.7%, 3 or more—3.1% |
Severe accidents | 0–96.1%, 1–2.8%, 2–0.8%, 3–0.3% |
Pedestrian accidents | 0–93.0%, 1–6.7%, 2–0.3% |
Bus accidents | 0–96.9%, 1–3.1% |
Bus & pedestrian accidents | 0–98.0%, 1–2.0% |