boarding areas asking crowds to move back from the warning tiles at the edge of platforms to avoid falling onto the tracks. In the event of emergencies or unexpected events aboard the train, alerts are used to inform passengers about the current state of the operations. The LRTA uses three alerts: Codes Blue, Yellow, and Red. Smoking, previously banned only at station platforms and inside trains, has been banned at station concourse areas since June 24, 2008. Hazardous chemicals, such as paint and gasoline, as well as sharp pointed objects that could be used as weapons, are forbidden. Full-sized bicycles and skateboards are also not allowed on board the train, although the ban on folding bicycles was lifted on November 8, 2009. Those under the influence of alcohol may be denied entry into the stations. In response to the Rizal Day bombings, a series of attacks on December 30, 2000, that included the bombing of a Line 1 train among other targets, and in the wake of greater awareness of terrorism following the September 11 attacks, security has been stepped up on board the system. The Philippine National Police has a special police force assigned at both lines. and security police provided by private companies are assigned to all stations with each having a designated head guard. Closed-circuit televisions have been installed to monitor stations and keep track of suspicious activities. To better prepare for and improve response to any adverse incidents, drills simulating terror attacks and earthquakes have been conducted. It is standard practice for bags to be inspected upon entry into stations by guards equipped with hand-held metal detectors. Those who refuse to submit to such inspection may be denied entry. Since May 1, 2007, the LRTA has enforced a policy against making false bomb threats, a policy already enforced at airports nationwide. Those who make such threats can face penalties in violation of Presidential Decree No. 1727, as well as face legal action. Posted notices on station walls and inside trains remind passengers to be careful and be wary of criminals who may take advantage of the crowding aboard the trains. To address concerns of inappropriate contact on crowded trains, the first coach of Line 1 and Line 2 trains have been designated for PWDs and females only. COVID-19 measures As a response to the COVID-19 pandemic, the system operated at a limited capacity when public transport