Current Affairs
This federal program continues to award grants for Vision Zero and roadway safety action plans across U.S. cities.
What is SS4A (Safe Streets and Roads for All)?
This signal technology allows buses to “request green” to improve schedule reliability.
What is Transit Signal Priority (TSP)?
This TxDOT standard governs how traffic signal heads, poles, and mast arms should be designed and installed.
What is TxDOT Standard Sheet TS-Series?
This FHWA methodology evaluates the expected crash reduction from safety countermeasures.
What is the CMF (Crash Modification Factor)?
This metric measures intersection performance on a scale from A to F.
What is LOS (Level of Service)?
This Texas highway megaproject recently advanced major environmental and schematic milestones, affecting I-45 mobility and regional connectivity in Houston.
What is the NHHIP (North Houston Highway Improvement Project)?
This cloud-based platform is frequently used for real-time dashboards integrating ATSPM, signal controllers, and probe data.
What is an ITS Data Hub / ATSPM platform
This design element ensures emergency preemption systems can override normal signal operations.
What is EVP detection / Opticom preemption?
This type of crash is most common at signalized intersections when left-turns are unprotected.
What is an angle crash?
This model is used by MPOs to forecast future traffic by linking land use, trips, mode split, and assignments.
What is the four-step travel demand model?
This agency released updated guidance on V2X deployment emphasizing spectrum efficiency after the 5.9 GHz reallocation.
What is the FCC or USDOT?
This communication method is replacing copper interconnect for traffic signals and ITS devices due to higher bandwidth and longevity.
What is fiber optic communication?
This geometric feature—often added at intersections—reduces left-turn conflicts and enhances safety.
What is a dedicated left-turn lane (or protected left-turn phasing)?
This federal program identifies and funds systemically risky roadway locations, not just hotspots.
What is HSIP (Highway Safety Improvement Program)?
This type of coordination improves two-way progression on arterials with nonuniform spacing.
What is bandwidth optimization or time-space diagram-based coordination?
This federal act continues to provide record-level infrastructure funding for transit, safety, and ITS deployments.
What is the IIJA/BIL (Infrastructure Investment and Jobs Act / Bipartisan Infrastructure Law)?
This simulation tool integrates microsimulation with traffic signals and priority logic and is used frequently for corridor studies.
What is VISSIM?
This spacing guideline helps prevent signal platoon dispersion on coordinated corridors.
What is the uniform signal spacing principle (typically 1/4–1/2 mile)?
These roadside devices warn drivers of speed compliance and improve yielding at crosswalks.
What are RRFBs (Rectangular Rapid Flashing Beacons)?
This traffic analysis software calculates delay, v/c ratio, and LOS based on HCM methodologies.
What is Synchro?
This program provides funding specifically for pedestrian and bicycle safety improvements on high-risk corridors.
What is the Pedestrian and Bicycle Safety Program (PBSP) under FHWA?
This emerging technology uses roadside units and onboard units to support SPaT, MAP, and warnings to drivers.
What is C-V2X?
This ITS cabinet type houses controllers, switches, and communication equipment for freeway and arterial deployments.
What is a Type 332/336 or ITS field cabinet?
This methodology uses observed and expected crash frequencies to adjust for regression to the mean.
What is the Empirical Bayes method?
This planning concept manages driveway spacing to improve flow and reduce conflict points along corridors.
What is access management?