This dataset is the MOVES-Matrix emission rates for the NCST project of Energy and Emissions Impacts of Atlanta’s Reversible Express Toll Lanes and High-Occupancy Toll Lanes, developed by our research team at Georgia Institute of Technology.

The abstract of the project is as follows.

This report summarizes the impact on corridor-level energy use and emissions associated with the 2018 opening of the I-75 Northwest Corridor (NWC) and I-85 Express Lanes in Atlanta, GA. The research team tracked changes in vehicle throughput on the managed lane corridors (extracted from GDOT’s Georgia NaviGAtor machine vision system after comprehensive QA/QC) and performed a difference-in-difference analysis to exclude regional changes, pairing test sites vs. control sites not influenced by the openings. The results show a large increase in overall peak-period vehicle throughput on the NWC, especially on I-575, due to the congestion decrease (20 mph speed increases at some locations). The increase in corridor-level energy use and emissions was smaller than vehicle throughput, but still significant. Predicted downwind maximum CO concentrations only increased from 1.81 ppm to 1.93 ppm(which remains extremely low). The increase in morning peak activity on the corridor likely resulted from diversion of some traffic into the peak from the shoulder periods, diversion of some traffic from other nearby freeway corridors, and diversion of local road traffic into the corridor. Unfortunately, without overall control volume totals and/or pre-and-post travel behavior surveys for the alternative commute routes, it is not possible to quantify the likely reductions in traffic flow and emissions that occurred along the other corridors that likely resulted from morning commute shifts. Hence, the team cannot draw reliable conclusions related to net regional or sub-regional impacts associated with the new managed lane corridors. The impact observed on the I-85 corridor was much smaller than on the NWC, especially at Indian Trail/Lilburn Road (far from the Express Lane Extension). After the Express Lanes opened, energy use and emission rates at Old Peachtree Road increased slightly (as uncongested vehicle speeds increased), but this increase may be short-lived as traffic on the corridor changes over time.

This ready-to-print map shows the proposed sidewalk projects only from the T-SPLOST program.On November 8, 2016, Fulton County voters, including residents of Sandy Springs, approved the Transportation Special Purpose Local Option Sales Tax (T-SPLOST), a referendum to fund transportation improvements within the participating cities. In Sandy Springs, T-SPLOST passed with 56.7 percent of the vote.Beginning in April 2017, a 0.75 percent (3/4 of a cent) sales tax will be collected to fund the T-SPLOST transportation projects. An estimate $103.7 million over five years is expected to be raised for use in Sandy Springs for transportation improvements. Who pays the 0.75 percent tax? The sales tax will be paid by anyone - residents, visitors, businesses and tourists - who buys taxable products or services inside Fulton County, outside City of Atlanta limits. Where will the money be spent? The projects identified and approved by the City Council as part of the T-SPLOST initiative are listed below:Traffic Efficiency Improvements: Provides for local intersection and traffic efficiency upgrades throughout the city ($18,000,000)Perimeter Transit Last Mile Connectivity: Construct Perimeter Trails and acquire right-of-way for future high capacity transit linking the Perimeter CID and other alternative transportation options ($8,000,000)Sidewalk Program: Continue filling sidewalk gaps throughout Sandy Springs ($11,000,000)Johnson Ferry/Mt Vernon Efficiency Improvements: Construct dual roundabouts at Johnson Ferry Road and Mt Vernon Hwy intersections, sidewalks, and return streets to two-way traffic operations. ($26,000,000)Mt Vernon Multi use Path: Create path from City Springs to Sandy Springs MARTA ($11,000,000)Hammond Drive, Phase 1 Efficiency Improvements: Complete design for Hammond Drive project to include 4 lanes with sidewalks, bicycle lanes, and transit lanes, and acquire right-of-way ($16,000,000)SR 400 Trail System: Connect Path 400 Trail from terminus at Loridans Drive to I-285/SR400 interchange trail ($5,500,000)Roberts Drive Multi use Path: Roswell road to Island Ford Park ($5,500,000)Roadway Maintenance and Paving: Provide for paving and roadway maintenance throughout the city ($16,785,429)