The dataset contains two csv files network.csv and CES.csv. This readme file describes the data presented in these two csv files.
1. network.csv
	FROM		- tail node of an arc in the SCAG network
	TO			- head node of an arc in the SCAG network
	CAPACITY	- arc capacity (number of passenger car units per hour)
	LENGTH		- length of the arc (miles)
	FFT			- free flow travel time on the arc (hrs)
	SHAPE		- shape parameter of the Weibull distribution defining the stochastic arc speed
	SCALE		- scale parameter of the Weibull distribution defining the stochastic arc speed
	ALPHA		- arc parameter of the BPR function
	BETA		- arc parameter of the BPR function
	
2. CES3.csv
	Census Tract					- Census tract id
	Total population				- Population of the census tract
	California County				- Census tract county location
	ZIP								- ZIP code
	Nearby City						- Closest city nearby
	Longitude						- Longitude of the census tract
	Latitude						- Latitude of the census tract
	CES 3.0 Score					- CES score of the census tract
	CES 3.0 Percentile				- CES score percentile of the census tract
	CES 3.0 Percentile Range		- CES score percentile range of the census tract
	SB 535 Disadvantaged Community	- Binary variable describing if the census tract is SB 535 defined disadvantage community
	Ozone							- Mean of summer months (May - October) of the daily maximum 8-hour ozone concentration (ppm), averaged over three years (2012 to 2014)
	Ozone Pctl						- Ozone index pecentile of the census tract
	PM2.5							- Annual mean concentration of PM2.5 (average of quarterly means, μg/m3), over three years (2012 to 2014)
	PM2.5 Pctl						- PM2.5 index percentile of the census tract
	Diesel PM						- Spatial distribution of gridded diesel PM emissions from on-road and non-road sources for a 2012 summer day in July (kg/day)
	Diesel PM Pctl					- Diesel PM index percentile of the census tract
	Drinking Water					- Drinking water contaminant index for selected contaminants
	Drinking Water Pctl				- Drinking water index of the census tract
	Pesticides						- Total pounds of selected active pesticide ingredients (filtered for hazard and volatility) used in production - agriculture per square mile, averaged over three years (2012 to 2014) 
	Pesticides Pctl					- Pesticides index percentile of the census tract
	Tox. Release					- Toxicity - weighted concentrations of modeled chemical releases to  air from facility emissions and off - site incineration (averaged  over  2011 to 2013)
	Tox. Release Pctl				- Toxicity index percentile of the census tract
	Traffic							- Traffic density – Sum of traffic volumes adjusted by road segment length(vehicle-kilometers per hour) divided by total road length (kilometers) within 150 meters of the census tract boundary (2013)
	Traffic Pctl					- Traffic index percentile of the census tract
	Cleanup Sites					- Sum of weighted sites within each census tract. Since the nature and the magnitude of the threat and burden posed by hazardous substances vary among the different types of sites as well as the site status, the indicator takes both into account. Weights were also adjusted based on proximity to populated census blocks.
	Cleanup Sites Pctl				- Cleanup sites index percentile of the census tract
	Groundwater Threats				- Sum of weighted scores for sites within each census tract. The indicator takes into account information about the type of site, its status, and its proximity to populated census blocks.
	Groundwater Threats Pctl		- Gorundwater threats index percentile of the census tract
	Haz. Waste						- Sum of weighted permitted hazardous waste facilities and hazardous waste generators within each census tract
	Haz. Waste Pctl					- Hazardous waster index percentile of the census tract
	Imp. Water Bodies				- Summed number of pollutants across all water bodies designated as impaired within the area
	Imp. Water Bodies Pctl			- Important water bodies index percentile of the census tract
	Solid Waste						- Sum of weighted solid waste sites and facilities
	Solid Waste Pctl				- Solid waste index percentile of the census tract
	Pollution Burden Score			- Pollution Burden scores for each census tract are derived from the average percentiles of the seven Exposures indicators (ozone and PM2.5 concentrations, diesel PM  emissions, drinking water contaminants, pesticide use, toxic releases from facilities, and traffic density) and the five Environmental Effects indicators (cleanup sites, impaired water  bodies, groundwater threats, hazardous waste facilities and generators, and solid waste sites and facilities). Indicators from the Environmental Effects component were given half the weight of the indicators from the Exposures component. The calculated average pollution buden score (average of the indicators) was divided by 10 and rounded to one decimal place for a Pollution Burden score ranging from 0.1 - 10.
	Pollution Burden Pctl			- Pollution burden score percentile of the census tract
	Asthma							- Spatially modeled, age - adjusted rate of emergency department (ED)  visits for asthma per 10,000
	Asthma Pctl						- Asthama index percentile of the census tract
	Low Birth Weight				- Medical data related to a birth, as well as demographic information related to the infant, mother, and father is collected from birth certificates. Personal identifiers are not released publicly to protect confidentiality
	Low Birth Weight Pctl			- Low birth weight index percentile of census tract
	Cardiovascular Disease			- Spatially modeled, age - adjusted r ate of emergency department (ED)  visits for  AMI per 10,000 
	Cardiovascular Disease Pctl		- Cardiovascular disease index percentile of the census tract
	Education						- Percent of the population over age 25 with less than a high school education
	Education Pctl					- Education index percentile of the census tract
	Linguistic Isolation			- Percent limited English-speaking households 
	Linguistic Isolation Pctl		- Linguistic isolation index percentile of the census tract
	Poverty							- Percent of the population living below two times the federal poverty  level
	Poverty Pctl					- Poverty index percentile of the census tract
	Unemployment					- Percent of the population over the age of 16 that is unemployed and eligible for the labor force. Excludes retirees, students, homemakers, institutionalized persons except prisoners, those not looking for work, and military personnel on active duty
	Unemployment Pctl				- Unemployment index percentile of the census tract
	Housing Burden					- Housing Burdened Low Income Households. Percent of households in a census tract that are both low income (making less than 80% of the HUD Area Median Family Income) and severely burdened by housing costs (paying greater than 50% of their income to housing costs)
	Housing Burden Pctl				- Housing burden index percentile of the census tract
	Pop. Char. Score				- Population Characteristics scores for each census tract are derived from the average percentiles for the three Sensitive Populations indicators (asthma, cardiovascular disease, and low birth weight) and the five Socioeconomic Factors indicators (educational attainment, housing burdened low income households, linguistic isolation, poverty, and unemployment). The calculated average percentile divided by 10 for a Population Characteristic score ranging from 0.1 - 10.
	Pop. Char. Pctl					- Population Characteristics score percentile of the census tract.

	