-- Iteration 1 Database Schema
-- Objective: Schema changes include creating new tables for travel times and delay factors, modifying existing tables to include weather data, and updating configuration logic for weather impact coefficients.

CREATE TABLE train_travel_times (
  train_id INTEGER,
  station_id INTEGER,
  adjusted_travel_time FLOAT
);

CREATE TABLE station_delay_factors (
  station_id INTEGER,
  delay_factor FLOAT
);

