Why do some highways lack emergency lanes?

[VonGrant]

Some highways lack emergency lanes primarily due to cost considerations. Definition of emergency lane: The emergency lane on a highway refers to the section adjacent to the right-side traffic lane, including the hard shoulder, with a width of over 3 meters and an effective length of 30 meters or more, capable of accommodating vehicle parking. In emergency situations, vehicles may drive or park on the emergency lane. Emergency lane parking guidelines: If encountering unresolvable issues like vehicle breakdowns, park the vehicle in the emergency stopping area, activate hazard warning lights, place warning signs 150 meters behind the vehicle, and during nighttime, rain, or fog, also turn on position lights, tail lights, and rear fog lights. All occupants must move to a safe area and, if necessary, promptly call the highway emergency number for assistance.