; or (B) addresses a highway safety problem. (2) Projects described A project described in this paragraph is a project for one or more of the following: (A) An intersection safety improvement. (B) Pavement and shoulder widening (including the addition of a passing lane to remedy an unsafe condition). (C) Installation of rumble strips or another warning device, if the rumble strips or other warning devices do not adversely affect the safety or mobility of bicyclists and pedestrians, including persons with disabilities. (D) Installation of a skid-resistant surface at an intersection or other location with a high frequency of crashes. (E) An improvement for pedestrian or bicyclist safety or the safety of persons with disabilities. (F) Construction and improvement of a railway-highway grade crossing safety feature, including the installation of protective devices. (G) The conduct of a model traffic enforcement activity at a railway-highway crossing. (H) Construction of a traffic calming feature. (I) Elimination of a roadside hazard. (J) Installation, replacement, and other improvements of highway signage and pavement markings or a project to maintain minimum levels of retroreflectivity that addresses a highway safety problem consistent with a State strategic highway safety plan. (K) Installation of a priority control system for emergency vehicles at signalized intersections. (L) Installation of a traffic control or other warning device at a location with high crash potential. (M) Transportation safety planning. (N) Collection, analysis, and improvement of safety data. (O) Planning integrated interoperable emergency communications equipment, operational activities, or traffic enforcement activities (including police assistance) relating to work zone safety. (P) Installation of guardrails, barriers (including barriers between construction work zones and traffic lanes for the safety of road users and workers), and crash attenuators. (Q) The addition or retrofitting of structures or other measures to eliminate or reduce