ERAM (En Route Automation Modernization) is an FAA Air Traffic Control system designed to “allow faster processing of road requests and flight routes”. 
The En Route Automation Modernization (ERAM) system architecture replaces the En Route Host computer system and its backup. ERAM provides all of today’s functionality and:
- Adds new capabilities to support the evolution of the US National Airspace System
- Improve the security and flowlines at US international borders
- Processes flight radar data
- Provides communications support
- Generators display data to air traffic controllers
- The information system provides real-time electronic aeronautical information and efficient data management.
- Provides a full functional backup system, precluding the need to restrict operations in the event of a primary failure
- The backup system provides the National Transportation Safety Board-recommended safety alerts, altitude warnings and conflict alerts.
- Improves monitoring by sources
- Detects and alerts for air traffic controllers when they are flying too close together for both safety and long term planning.
- ERAM simultaneously supports many operating modes and complex airspace configurations, driven by thousands of users who want to use the airspace differently.
- Allows more than one host computer
The open system architecture allows the use of future capabilities to efficiently handle traffic growth and ensure a more stable and supportable system.
The FAA is deploying ERAM at 20 Air Route Traffic Control Centers ( ARTCCs ), the Williams J. Hughes Technical Center , and the FAA Academy .
- Step 1, 2006
- Replace the current En Route computer backup system with Enhanced Backup Surveillance.
- Step 2, 2007
- Provide electronic controllers real-time access to weather data, aeronautical data, air traffic control procedures documents, Notices to Airmen ( NOTAMs ) Pilot Reports ( PIREPs ) and other information with the En Route Information Display System ( ERIDS ).
- Step 3, 2009
- Replace the current On-the-fly Host computer with a fully redundant, stand-alone backup system. 
By the end of September 2011, the Salt Lake City ( ZLC ) and the Seattle ( ZSE ) ARTCCs. The project was over budget and behind schedule, and the original deployment dates were pushed back several times. While the system was deemed suitable for operational use, many workarounds were in place while awaiting software updates. Testing and dry runs.
 HOST Computer System can be decommissioned. In addition to the DSB site, continuous operations-have-been Declared at the Washington ( ZDC ) ARTCC, meaning all 20 ARTCCs in the CONUS are now using ERAM 24/7 to control en route air traffic over an area covering more than 3 million square miles .
In April 2014, the ERAM system at the Los Angeles ARTCC failed Causing a ground-propagated Stop That  Throughout The western United States and lasting as long as 2.5 hours.
All ARTCCs operating under ERAM are equipped with NextGen Capabilities of Automatic Dependent Surveillance-Broadcast ( ADS-B ) and System Wide Information Management ( SWIM ).
- Jump up^ National Air Space Capital Investment Plan Fiscal Years 2007-2011
- Jump up^ “En Route Automation Modernization (ERAM)” . Federal Aviation Administration .
- Jump up^ “En Route Automation Modernization (ERAM)” (PDF) . Federal Aviation Administration .
- Jump up^ “FAA Computer Problem Delays Flights in the West” . The New York Times . 30 Apr 2014 . Retrieved 30 Apr 2014 .