TY  - JOUR
PY  - 2023//
TI  - How to define a safety tolerance zone for speed? Insights from the i-DREAMS project
JO  - Transportation research procedia
A1  - Michelaraki, Eva
A1  - Kallidoni, Marianthi
A1  - Katrakazas, Christos
A1  - Brijs, Tom
A1  - Yannis, George
SP  - 415
EP  - 422
VL  - 72
IS  - 
N2  - Several factors of driver state negatively impact road safety, such as distraction (in-vehicle or external), fatigue and drowsiness, health issues and extreme emotions. The aim of the current study is to define a Safety Tolerance Zone (STZ) for speed, and integrate crash prediction and risk assessment. A naturalistic driving experiment was conducted and data from a representative sample (N=20 drivers) was utilized. Explanatory variables of risk and the most reliable indicators were assessed. A feature importance algorithm extracted from Extreme Gradient Boosting (XGBoost) was used to evaluate the significance of variables on forecasting STZ. Additionally, a Neural Network model was implemented for real-time data prediction. <br><br>RESULTS indicated a strong relationship between the STZ level for speed and the independent variables of headway, distance travelled and medium harsh braking events.<p />  <p>Language: en</p>
LA  - en
SN  - 2352-1465
UR  - http://dx.doi.org/10.1016/j.trpro.2023.11.422
ID  - ref1
ER  -