Transportation Control Measures (TCMs) are identified by air
quality management plans and implementation plans to
reduce emissions or concentrations of air pollutants from
transportation sources by reducing vehicle use, changing traffic
flow, or congestion conditions. SCAG works closely with
the CTCs and Caltrans to ensure timely implementation of
committed TCM projects in the region. Substitution of individual
TCMs follows the process specified in the federal Clean Air Act
(CAA) section 176(c). Section 176© of the CAA allows for the
substitution of individual TCMs if certain conditions are met.
The CTCs and/or project sponsors notify SCAG when a TCM project
cannot be delivered or will be significantly delayed. SCAG and
the CTCs identify and evaluate possible replacement measures for
individual substitutions, with consultation from the
Transportation Conformity Working Group (TCWG), which includes
members from all affected jurisdictions, federal, state and/or
local air quality agencies, and transportation agencies.
Air quality plans and corresponding documents are maintained and
available on the California
Air Resources Board website.
Legal/Regulatory/Requirements and Guidance
TCM Substitutions
2022
Orange County Transportation Authority (OCTA)
TCM Substitution Report (Federal Transportation Improvement
Program (FTIP) IDs ORA130099 & ORA030612)
OCTA TCM Substitution Report (FTIP IDs 10254, ORA050 &
ORA051)
2018
Draft OCTA TCM Substitution Report for Public
Review
2016
OCTA TCM Substitution
2015
Los Angeles County Metropolitan Transportation Authority (Metro),
Riverside County Transportation Commission (RCTC), and San
Bernardino Associated Governments (SANBAG) TCM
Substitutions
2013
Replacement of a Bus Purchase Project with Traffic Signal
Synchronization Projects in Orange County (OCTA)
2010
State Route 60 HOV Lane Conversion of Moreno Valley, Riverside
County (Caltrans)
Replacement of Bus Rapid Transit (BRT) Projects with Signal
SychronizationSynchronization Projects in Orange County
(OCTA)
