# Car Crash Severity Prediction — Data

来源：https://www.kaggle.com/competitions/car-crash-severity-prediction/data

采集时间：2026-10-20T04:04:41Z

# 🚗 Car Crash Severity - Feature Explanations

## 🚨 Crash-Specific Features
| Feature | Description | Business Relevance | Impact |
|---------|-------------|--------------------|--------|
| ⚡ **Crash Speed (km/h)** | Vehicle speed at impact | Higher speeds → more severe crashes | Kinetic energy increases with speed² → greater damage |
| 📐 **Impact Angle (degrees)** | Angle of collision (0°=head-on, 90°=side) | Determines force distribution | Side impacts → higher fatality (weaker side protection) |
| 💨 **Airbag Deployed** | Whether airbags activated (Yes/No) | Reduces injury severity | Cushions impact → 29% reduction in fatalities |
| 🚗 **Seatbelt Used** | Driver seatbelt status (Yes/No) | Key safety factor | Unbelted drivers → 30x ejection risk |
| ☀️ **Weather Conditions** | Clear/Rain/Fog/Snow | Adverse weather → higher risk | Rain/Snow → 34% more severe crashes |
| 🛣️ **Road Conditions** | Dry/Wet/Icy/Uneven | Poor conditions → severe crashes | Icy roads → 2x rollover risk |
| 💥 **Crash Type** | Head-on/Side/Rear-end/Rollover | Some types more dangerous | Rollovers → 3x fatality rate |

## 🚗 Vehicle-Specific Features
| Feature | Description | Business Relevance | Impact |
|---------|-------------|--------------------|--------|
| 🚘 **Vehicle Type** | Sedan/SUV/Truck/Motorcycle | Varying crash absorption | Motorcycles → 28x higher fatality risk |
| 📅 **Vehicle Age (years)** | Years since manufacture | Older → outdated safety | Pre-2010 cars → 2x severe injury rate |
| 🛑 **Brake Condition** | Good/Worn out | Affects stopping distance | Worn brakes → 25% longer stops |
| 🛞 **Tire Condition** | Good/Worn out | Impacts grip | Worn tires → 40% more skidding |

## 👨‍✈️ Driver-Specific Features
| Feature | Description | Business Relevance | Impact |
|---------|-------------|--------------------|--------|
| 👶 **Driver Age** | Driver's age | Young/elderly higher risk | Teens → 3x crash risk vs adults |
| 🎓 **Experience (years)** | Years driving | Experience → better reactions | 10+ yrs → 35% fewer severe crashes |
| � **Alcohol Level (BAC%)** | Blood alcohol content | BAC ≥0.08% → severe crashes | 0.08% BAC → 4x crash risk |
| 📵 **Distraction Level** | None/Phone/Drowsiness/Other | Major accident cause | Phone use → 3x crash risk |

## 🌍 Environmental Features
| Feature | Description | Business Relevance | Impact |
|---------|-------------|--------------------|--------|
| ⏰ **Time of Day** | Morning/Afternoon/Night | Night → higher risk | Night crashes → 3x more fatal |
| 🚦 **Traffic Density** | Low/Medium/High | Congestion → pileups | High density → 5x multi-vehicle crashes |
| 👀 **Visibility (m)** | Distance driver can see | Low visibility → severe crashes | <100m → 2x fatal crash rate |

## 🎯 Target Variable
| Feature | Description | Business Relevance |
|---------|-------------|--------------------|
| 🚑 **Severity** | Minor Injury/Severe Injury/Fatal | Prioritize emergency response |