; Public Law 112–141 ). (X) Systemic safety improvements. (Y) Installation of vehicle-to-infrastructure communication equipment. (Z) Pedestrian hybrid beacons. (AA) Roadway improvements that provide separation between pedestrians and motor vehicles, including medians and pedestrian crossing islands. (BB) A physical infrastructure safety project not described in subparagraphs (A) through (AA). (b) New categorical exclusions (1) Review of existing categorical exclusions The Secretary shall review the categorical exclusions under section 771.117 of title 23, Code of Federal Regulations (or successor regulations), to determine which, if any, are applicable for use by the Secretary in review of projects eligible for assistance under section 202 of title 23, United States Code. (2) Review of tribal transportation safety projects The Secretary shall identify tribal transportation safety projects that meet the requirements for categorical exclusions under sections 1507.3 and 1508.4 of title 40, Code of Federal Regulations. (3) Proposal The Secretary shall issue a proposed rule, in accordance with sections 1507.3 and 1508.4 of title 40, Code of Federal Regulations, to propose any categorical exclusions identified under paragraphs (1) and (2). (4) Deadline Not later than 180 days after the date of enactment of this Act, and after considering any comments on the proposed rule issued under paragraph (3), the Secretary shall promulgate a final rule for the categorical exclusions, in accordance with sections 1507.3 and 1508.4 of title 40, Code of Federal Regulations. (5) Technical assistance The Secretary of Transportation shall provide technical assistance to the Secretary in carrying out this subsection. (c) Reviews of tribal transportation safety projects (1) In general The Secretary or the head of another Federal agency responsible for a decision related to a tribal transportation safety project shall complete any approval or decision for the review of the tribal transportation safety project required under the National