Software name prefixes are:
COR	for CORridor
NET	for street NETwork
FRE	for FREeway network
ROAD	for a 2 lane ROAD network

Software name suffixes are:
SIM	for microscopic SIMulation
FLO	for macroscopic FLOw simulation.

CORFLO is for the macroscopic simulation of a corridor and is made of FREFLO and NETFLO1 and NETFLO2. CORFLO is used for analyzing urban transportation networks. The model runs in less time and provides less detailed output than NETSIM.

CORSIM is for simulation and traffic and traffic control conditions of a combined urban and freeway network over a period of time on a microscopic level. CORSIM predicts the effect of traffic engineering and TSM strategies on a prescribed system's operational performance, as expressed in terms of Measures of Effectiveness (MOE). The MOE provide insight into the effects of an applied strategy on the traffic streams, and they also provide the basis for optimizing that strategy.

FRESIM provides a microscopic freeway simulation model for analyzing operational improvements in freeway networks.

FREQ is used for macroscopic modeling of only freeways. It yields results similar to CORSIM.

HCS is Highway Capacity Software designed to replicate procedures, manual worksheets, and examples in the Highway Capacity Manual (HCM) which is issued by the Transportation Research Board. The HCM covers topics including: freeways, freeway weaves and ramps; multilane and two-lane highways; and, urban roadways including signalized and unsignalized intersections, arterials, transit, pedestrians, and bicycles. Changes made in the HCM are also made in the HCS.

NETSIM is used for microscopic simulation and analysis of urban traffic and arterial corridors. Simulation abilities include: different vehicle types (e.g.,buses, trucks, carpool), pedestrian interaction, traffic signs (e.g., yield signs and right turn on red), different signal types (e.g., actuated or fixed time), on-street parking, HOV, and graphic animation. NETSIM simulation results include: delay per vehicle, average speed, number of stops, queue lengths, vehicle origin-destination information, bus routes, and animation.

TSIS. Traffic Software Integrated System. A computer software utility program that provides for use of traffic engineering design and analysis tools. TSIS assists in the installation of traffic engineering applications software and provides menu-driven access to traffic engineering applications software. TSIS provides access to NETSIM, CORFLO, and FRESIM.