diff --git a/inc/gtfs.php b/inc/gtfs.php
new file mode 100644
index 0000000..b4c49da
--- /dev/null
+++ b/inc/gtfs.php
@@ -0,0 +1,190 @@
+<?php
+class gtfs {
+  //private static $files = ["calendar_dates", "calendar", "routes", "stop_times", "stops", "trips"];
+
+  private $db;
+
+  private static $dow = ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"];
+
+  function __construct($path = null) {
+    global $conf;
+
+    try {
+      $this->db = new PDO('sqlite:'.($conf["databaseFile"]));
+    } catch (PDOException $e) {
+      die("SQLite error: $e\n");
+    }
+  }
+
+  static function timeSinceMidnight() {
+    //return 8*60*60 + 9*60; //TESTING
+    return (time() - mktime(0, 0, 0));
+  }
+
+  static function today() {
+    return date("Ymd");
+  }
+
+  static function time2seconds($time) {
+    $timeSinceMidnight = self::timeSinceMidnight();
+
+    $boom = explode(":", $time);
+    if (count($boom) != 3) return null;
+
+    return ((($boom[0]*60) + $boom[1])*60 + $boom[2]) % (24*60*60);
+  }
+
+  private function fetchAll($sql) {
+    $query = $this->db->query($sql);
+    if (!$query) return false;
+
+    return $query->fetchAll(PDO::FETCH_ASSOC);
+  }
+
+  private function fetchAllPrepared($sql, $values) {
+    $query = $this->db->prepare($sql);
+    if (!$query) return false;
+
+    $query->execute($values);
+    return $query->fetchAll(PDO::FETCH_ASSOC);
+  }
+
+  private function fetchTable($table, $filters = [], $orderedField = null) {
+    $order = ($orderedField === null ? "" : " ORDER BY $orderedField");
+
+    if (!count($filters)) {
+      return $this->fetchAll("SELECT * FROM $table".$order);
+    }
+
+    $whereConditions = [];
+    $values = [];
+    foreach ($filters as $filter) {
+      $whereConditions[] = $filter[0]." = ?";
+      $values[] = $filter[1];
+    }
+
+    return $this->fetchAllPrepared("SELECT * FROM $table WHERE ".implode(" AND ", $whereConditions).$order, $values);
+  }
+
+  function getRoutes() {
+    return $this->fetchTable("routes");
+  }
+
+  function getTrips($route) {
+    return $this->fetchTable("trips", [["route_id", $route]]);
+  }
+
+  function getStations($ordered = false) {
+    return $this->fetchTable("stops", [["location_type", Gtfs\Stop\LocationType::STATION]], ($ordered ? "stop_name" : null));
+  }
+
+  function getStop($stop) {
+    $results = $this->fetchTable("stops", [["stop_id", $stop]]);
+
+    if (!count($results)) return null;
+
+    return $results[0];
+  }
+
+  function getPlatforms($stop) {
+    $results = $this->fetchTable("stops", [["parent_station", $stop], ["location_type", Gtfs\Stop\LocationType::STOP]], "stop_id");
+
+    return $results;
+  }
+
+  const TIME_LIMIT = 160;
+  function getStopTimes($stop, $timeLimit = self::TIME_LIMIT) {
+    $stops = $this->getPlatforms($stop);
+
+    $values = [];
+    foreach ($stops as $s) {
+      $values[] = $s["stop_id"]; // Stops
+    }
+
+    $rdow = (int)date("w");
+    $dow = self::$dow[$rdow]; // Today's day of week
+    $dow2 = self::$dow[($rdow + 1) % 7]; // Tomorrow's day of week
+
+    if (!count($stops)) return [];
+
+    $sql = "SELECT st.*, t.*, r.*, c.*, cd.*, strftime('%Y%m%d', 'now', 'localtime') as today, strftime('%Y%m%d', 'now', 'localtime', '1 day') as tomorrow, time('now', 'localtime') as now
+      FROM stop_times st
+      INNER JOIN trips t
+        ON st.trip_id = t.trip_id
+      INNER JOIN routes r
+        ON t.route_id = r.route_id
+      LEFT JOIN calendar c
+        ON t.service_id = c.service_id
+      LEFT JOIN calendar_dates cd
+        ON t.service_id = cd.service_id
+      WHERE
+      st.stop_id IN (".implode(", ", array_fill(0, count($stops), "?")).") AND
+      (
+        cd.service_id IS NULL OR
+        cd.exception_type = ".(int)Gtfs\CalendarDate\ExceptionType::ADDED."
+      ) AND
+      (
+        (
+          (
+            (
+              time(now) < time('00:00:00', '-".(int)$timeLimit." minutes') AND
+              st.departure_time BETWEEN time(now) AND time(now, '".(int)$timeLimit." minutes')
+            ) OR
+            (
+              time(now) >= time('00:00:00', '-".(int)$timeLimit." minutes') AND
+              st.departure_time BETWEEN time(now) AND strftime('24:%M:%S', now, '".(int)$timeLimit." minutes')
+            )
+          ) AND
+          (
+            c.service_id IS NULL OR
+            (
+              c.start_date <= today AND
+              c.end_date >= today AND
+              c.$dow = ".(int)Gtfs\Calendar\CalendarDay::AVAILABLE."
+            )
+          ) AND
+          (
+            cd.service_id IS NULL OR
+            cd.date = today
+          )
+        ) OR
+        (
+          (
+            (
+              time(now) < time('00:00:00', '-".(int)$timeLimit." minutes') AND
+              st.departure_time BETWEEN ((strftime('%H', now) + 24) || strftime(':%M:%S', now)) AND ((strftime('%H', now, '".(int)$timeLimit." minutes') + 24) || strftime(':%M:%S', now, '".(int)$timeLimit." minutes'))
+            ) OR
+            (
+              time(now) >= time('00:00:00', '-".(int)$timeLimit." minutes') AND
+              st.departure_time BETWEEN time(now) AND strftime('24:%M:%S', now, '".(int)$timeLimit." minutes')
+            )
+          ) AND
+          (
+            c.service_id IS NULL OR
+            (
+              c.start_date <= tomorrow AND
+              c.end_date >= tomorrow AND
+              c.$dow2 = ".(int)Gtfs\Calendar\CalendarDay::AVAILABLE."
+            )
+          ) AND
+          (
+            cd.service_id IS NULL OR
+            cd.date = tomorrow
+          )
+        )
+      )
+      ORDER BY departure_time ASC";
+
+    $result = $this->fetchAllPrepared($sql, $values);
+    if ($result === false) {
+      echo implode("\n", $this->db->errorInfo());
+      exit();
+    }
+
+    return $result;
+  }
+
+  function __destruct() {
+    $this->db = null;
+  }
+}