Instructions: In this task, you are given text for US Congressional and California state bills, your task is to generate a summary for this bill.
Input: SECTION 1. SHORT TITLE.

This Act may be cited as the ''Positive Train Control Enforcement
and Implementation Act of 2015''.

SEC. 2. ENSURING SAFE IMPLEMENTATION OF POSITIVE TRAIN CONTROL ON
POISONOUS OR TOXIC-BY-INHALATION AND PASSENGER RAIL
LINES.

Section 20157 of title 49, United States Code, is amended--
(1) in subsection (a)(1)--
(A) by striking ''18 months after the date of
enactment of the Rail Safety Improvement Act of 2008''
and inserting ''60 days after the date of enactment of
the Positive Train Control Enforcement and
Implementation Act of 2015'';
(B) by striking ''develop'' and inserting
''revise'';
(C) by striking ''December 31, 2015'' and inserting
''December 31, 2018, or the deadline determined
appropriate by the Secretary pursuant to paragraph
(2)''; and
(D) in subparagraph (B) by striking ''parts'' and
inserting ''sections'';
(2) by striking subsection (a)(2) and inserting the
following:
''(2) Authority to extend deadline.--
''(A) The Secretary may extend the deadline
described in paragraph (1) of this subsection,
applicable to each carrier or entity required to submit
a plan under paragraph (1), for a period not to exceed
12 months if such a carrier or entity demonstrates to
the satisfaction of the Secretary that such carrier or
entity--
''(i) will not be able to implement a
positive train control system by the deadline
described in paragraph (1) due to technical,
programmatic, or operational challenges, such
as availability of public funding, spectrum,
technology, and interoperability standards;
''(ii) has taken actions to address such
challenges and mitigate risks to successful
implementation of a positive train control
system; and
''(iii) has made good faith efforts to
implement the plan described in paragraph (1).
''(B)(i) The Secretary may grant an additional one-
time extension of the deadline described in paragraph
(1), applicable to each carrier or entity required to
submit a plan under paragraph (1), not to exceed 12
months, if such a carrier or entity, or a group
thereof, is not able to fully implement a positive
train control system on or before the date that is the
last day of the extension granted under subparagraph
(A), and such carrier or entity--
''(I) demonstrates to the satisfaction of
the Secretary that implementing a positive
train control system was delayed due to 1 or
more circumstances beyond the control of the
carrier or entity, such as a delay in Federal
approval of a plan, testing, or certification;
or
''(II) demonstrates to the satisfaction of
the Secretary--
''(aa) that such carrier or entity
will not be able to implement a
positive train control system by the
deadline described in paragraph (1) due
to technical, programmatic, or
operational challenges;
''(bb) due diligence in its efforts
to fully implement a positive train
control system; and
''(cc) that substantial progress
has been made in deploying positive
train control, to the extent feasible.
''(ii) A demonstrating carrier or entity under
clause (i) must certify to the Secretary in writing
that such carrier or entity will be in full compliance
with the requirements of this section on or before the
date that is the last date of the extension granted
under clause (i).
''(3) Implementation.--
''(A) The revised plan shall--
''(i) describe how the railroad carrier or
entity will provide for interoperability of the
system with movements of trains of other
railroad carriers or entities over its lines;
''(ii) to the extent practical, provide for
implementation of the system in a manner that
addresses areas of greater risk before areas of
lesser risk;
''(iii) comply with this section and
subpart I of part 236 of title 49, Code of
Federal Regulations; and
''(iv) include a detailed schedule and
sequence for fully implementing a positive
train control system in accordance with this
section and such regulations.
''(B) The railroad carrier shall implement a
positive train control system in accordance with such
plan.'';
(3) by striking subsections (c) and (d) and inserting the
following:
''(c) Progress Reports.--Not later than January 1, 2017, and
annually thereafter until full implementation of positive train control
systems has been completed, each railroad carrier or entity required to
revise and transmit a plan under subsection (a) shall submit to the
Secretary a report on the progress of such carrier or entity toward
implementing positive train control systems.
''(d) Reports.--
''(1) Congressional notification.--Not later than April 1,
2018, the Secretary shall transmit to the Committee on
Transportation and Infrastructure of the House of
Representatives and the Committee on Commerce, Science, and
Transportation of the Senate a report on the progress of the
railroad carriers in implementing positive train control
systems.
''(2) Public availability.--The Secretary shall make
available to the public on the Department of Transportation's
Internet Web site each progress report submitted pursuant to
paragraph (1) and subsection (c).''; and
(4) in subsection (h)--
(A) by striking ''The Secretary'' and inserting the
following:
''(1) In general.--The Secretary''; and
(B) by adding at the end the following:
''(2) Provisional operation.--In lieu of the requirements
of paragraph (1), the Secretary may authorize a railroad
carrier or other entity to commence operation in revenue
service of a positive train control system or component to the
extent necessary to enable the safe implementation of positive
train control systems in phases.''.
Output:
Positive Train Control Enforcement and Implementation Act of 2015 This bill extends deadlines and modifies requirements for railroad carriers and providers of intercity or commuter rail passenger transportation to implement positive train control (PTC) systems. (A PTC system is a communications and signaling system designed to prevent train-to-train collisions, over-speed derailments, incursions into established work zone limits, and the movement of a train through a switch left in the wrong position. Railroads which carry passengers or have high-volume freight traffic with certain hazardous materials are required to implement a PTC system.) Within 60 days of enactment of this bill, each Class I railroad carrier (the largest operators by revenue) and provider of intercity or commuter rail passenger transportation must submit to the Department of Transportation (DOT) a plan for implementing PTC by December 31, 2018, instead of the December 31, 2015, deadline required under current law. DOT may extend the deadline if specified requirements are met. The revised plan must include a detailed schedule and sequence for fully implementing PTC in a manner that complies with specified regulations, and railroads must implement PTC in accordance with the plan. DOT may authorize a railroad carrier or other entity to begin the provisional operation of a PTC system without the required certification if it is necessary to enable the safe implementation of PTC in phases.