(a) The commission, with assistance from the department and regional agencies, shall maintain a long-term balance of shares, shortfalls, and surpluses for regional improvement programs.

(b) The balance shall include all of the following:

(1) Shares from the fund estimate for each state transportation improvement program pursuant to Section 14525 of the Government Code.

(2) Amounts programmed in each state transportation improvement program pursuant to Section 14529 of the Government Code.

(3) Surpluses or shortfalls due to reservations or advancements pursuant to subdivision (j) of Section 188.8.

(4) Amounts deducted or added because of changes in project development costs or a cost increase or savings in the final engineering estimate or the final right-of-way certification estimate at the time of allocation for construction, pursuant to subdivisions (d) and (e) of Section 188.8.

(5) Any supplemental project allocations during or following construction, including supplemental allocations made pursuant to subdivision (b) of Section 188.9.

(6) Amounts deducted or added because of amendments to the state transportation improvement program that add, delete, or change the scope and cost of regional improvement projects, pursuant to Section 14531 of the Government Code.

(c) The balance through the preceding fiscal year shall be made available for review by all regional agencies at the time of each fund estimate, and by not later than August 15 of each year.

(d) The commission, through the fund estimate, shall restore for the next state transportation improvement program the interregional improvement program level specified in subdivision (a) of Section 164.

(Amended by Stats. 2012, Ch. 272, Sec. 5. (SB 1102) Effective January 1, 2013.)