ASTransitMonitor *transitMonitor = [ASTransitMonitor sharedInstance]; // create new instance
transitMonitor.delegate = self; // assign the delegate to self

[transitMonitor startMonitoring]; // start monitoring the user's transit

- (void)transitMonitor:(ASTransitMonitor *)transitMonitor didChangeTransitState:(ASTransitState)transitState {
    // Do something if the user starts driving here (or has changed transit)
}

- (void)transitMonitor:(ASTransitMonitor *)transitMonitor didChangeSpeed:(CGFloat)newSpeed oldSpeed:(CGFloat)oldSpeed{
    // Do something if the user has sped up here
}

- (void)transitMonitor:(ASTransitMonitor *)transitMonitor didAccelerationChange:(CMAcceleration)acceleration{
    // Do something if the user started shaking the device here
}