IC Bus

IC Bus is an American bus manufacturer. Headquartered in Lisle, Illinois, IC is a wholly owned subsidiary of International Motors. Established in 2002 by Navistar through the reorganization of subsidiary manufacturer American Transportation Corporation, IC currently produces school buses and commercial-use buses for multiple applications.
The IC name stands for "Integrated Coach", referring to how the vehicles are nearly completely assembled under a single corporate structure. For all vehicles, the body and chassis are assembled within the same manufacturing facility; the latter is designed by parent company Navistar. While using a chassis and hood shared with International-brand trucks, IC Bus vehicles have separate badging.
IC vehicles are produced at the Navistar Tulsa Bus Plant in Tulsa, Oklahoma. Prior to 2010, they were also assembled at the former AmTran/Ward facility in Conway, Arkansas.

History

Through its predecessor company AmTran, IC traces its roots to 1933, founded as Ward Body Works in Conway, Arkansas. Navistar predecessor International Harvester commenced chassis production 11 years earlier, entering production in 1922. Following the exit of several manufacturing firms from school bus production over the previous decade, IC would be the first newly established manufacturer in the 2000s.

2000s

In 2000, the IC name came into use for the first time, as AmTran introduced an updated version of its conventional-style bus body. While still based upon the International 3800 and sharing much of the body with its AmTran Volunteer/CS predecessor, the new bus introduced a redesigned drivers compartment and enlarged windshield. Named the International IC, the new bus emphasized how the entire vehicle was produced under the corporate entity of Navistar. To distinguish the International IC from other buses sharing the 3800 chassis, the hood of the IC was given its own grille and badging.
To bring the company in line with the truck manufacturing division of Navistar, AmTran changed its name to International Truck and Bus after 2000; its model lines adopted the International brand name and badging for the body in addition to the chassis. For 2003, International renamed its bus subsidiary a second time, to IC Corporation. After a minor revision, the International IC adopted the IC CE-Series name.
During the mid-2000s, IC began an overhaul of its product line. For 2005, the International 3300 was introduced as a cowled-chassis variant of the International 4000-series, becoming the first completely new cowled chassis from International since 1979. In 2006, IC produced its first small school bus, the 30-passenger BE200. In place of a cutaway van chassis, the BE adopted a lower-profile version of the 3300 chassis. Externally similar to the CE, the smaller BE was designed with a flat-floor interior.
To comply with 2007 EPA emissions standards, IC buses adopted MaxxForce diesel engines for 2007, including the MaxxForce 7 6.4L V8 and the MaxxForce DT 7.6L I6. For 2008, to improve engine ventilation, the FE was given a wider grille, with the BE and CE adopting the redesigned front bumper of the International DuraStar.
In April 2009, IC Corporation changed its name to IC Bus.

Commercial bus production

During its existence, the commercial product offerings of AmTran had been strictly derived from its school bus bodies, consisting as a small portion of its sales. In 2006, IC launched an expansion of its product range. Alongside the existing commercial derivatives of the BE, CE, and RE, the company introduced buses based on a cutaway-cab version of the International DuraStar. The HC was a range of shuttle buses; the LC was a paratransit bus with a low-floor configuration.

2010s

For 2010, IC underwent an overhaul of its product line. The FE-series was discontinued, leaving the RE as its sole transit-style bus offering. At the other end of the size spectrum, IC introduced two cutaway-cab buses derived from the International TerraStar truck. Slotted below the HC, the AC was a commercial shuttle bus, while the AE marked the first cutaway-cab school bus produced by the company. While using a smaller truck line for a donor chassis, the AE was offered in a higher seating capacity than the BE, up to 36 passengers.
In a branding change, from 2010 onward, Navistar badged the International 3200 as an IC, regardless of body manufacturer. The IC "wing" logo was revised slightly in 2013 for 2014 production.
In response to the failure of its EGR emissions strategy to meet emissions standards, Navistar began to phase out MaxxForce diesel engines in favor of Cummins-produced engines. In the CE, the Cummins ISB6.7 was introduced as an option for 2014 production, becoming the standard engine for 2015. In 2017, the MaxxForce DT was replaced by a Cummins L9 diesel for the RE series, with a Cummins B6.7 introduced during 2018 for the CE.
In the mid-2010s, IC centralized production around school buses. After 2014, the AE/AC, BE, and LC were discontinued. For 2018, the HC was replaced by the TC ; within the shuttle bus segment, IC reverted to a role of chassis provider, no longer producing completely-bodied vehicles.
Alongside the TC medium-duty cutaway cab, IC Bus currently produces the CE and RE-series as school buses/MFSABs ; both model lines are also offered in commercial applications.

Alternative-fuel strategy

In the United States, Navistar was the sole diesel engine manufacturer to pursue the use of exhaust gas recirculation to control diesel emissions rather than selective catalytic reduction. The company claimed EGR posed an advantage in overall fluid economy, although separate testing resulted in an advantage with SCR.
In 2015, IC debuted its first alternative-fuel vehicle, showing a propane-powered CE-Series with a PSI 8.8L V8 engine. In 2016, the same engine was introduced in a gasoline-fueled configuration.

Electric bus

On November 7, 2017, IC Bus announced the chargE, an all-electric CE Series bus delivering up to in power using a Volkswagen Truck & Bus Group-supplied common group electric drivetrain. It is the second electric vehicle to be delivered from the Navistar-Volkswagen alliance. The chargE started production in 2019

2020s

At the end of 2021, IC Bus announced the introduction of a 35-foot-8-inch body length for the CE, offering a capacity of up to 83 passengers. The largest-capacity Type C school bus ever produced, the new option retained the previously-offered 276-inch wheelbase.
In July 2023, IC unveiled a third generation of the CE series for 2025 production. Using the updated International MV as a base chassis, the new CE added a taller, wider windshield to the body structure ; the dashboard of the MV was integrated in its entirety. As of initial production, the third-generation CE is offered with diesel or electric powertrain options.
At the end of 2024 production, IC retired the long-running RE Series; coinciding with low overall market demand for rear-engine school buses, IC also cited upgrades in emissions standards for commercial vehicles. Produced with only incremental changes since 1996, the RE Series used the International 3000 chassis, the final variant of the International S-Series remaining in production.

Products

School/commercial buses

;Model designations
Prior to 2010, IC used the following nomenclature to designate the engine type; subsequently, only the model prefix has been used.

Diesel engine configuration	BE-Series	CE-Series	FE-Series	RE-Series
V8	BE200	CE200
Inline-6		CE300	FE300	RE300

Prototype vehicles

Forward Advantage Prototype

The IC FE Forward Advantage was a school bus prototype built by IC in 2008 as a testbed of a "flat-floor" design in the stepwell due to the compact design of the Caterpillar C7 engine. It also included some front-end styling modifications influenced by the severe-service line of International trucks. As Caterpillar has withdrawn from producing diesel engines for the school bus market, the Forward Advantage will not see production in its current form since its design was tailored to the Caterpillar engine.

Hybrid diesel-electric buses

IC offers hybrid diesel-electric powertrains in the CE conventional school bus as an option. The buses provide a claimed approximately 40% to 65% better fuel economy but cost about two and a half times more than a standard diesel bus.
Enova Systems entered into a long-term supply agreement with IC Bus that guarantees that Enova's proprietary Post Transmission Parallel Hybrid Electric drive system will be used in IC Bus' hybrid electric school buses. The hybrid school bus project features Enova's charge depleting or charge-sustaining systems. The drivetrain is powered by Valence Technology lithium ion phosphate battery modules. The braking system utilizes regenerative braking both as a means to reduce wear on the service brakes and to supply the batteries with extra power. As Enova went Bankrupt in 2014, IC Bus has discontinued the Hybrid option, once again leaving the CE with the Diesel Powertrain option.

Motorcoach prototypes

At the 2008 American Public Transportation Association Expo trade show, Navistar announced its intention to enter the intercity motorcoach segment by 2010, unveiling two prototypes produced by IC Bus. Using the MaxxForce 13 powerplant, IC Bus produced a 40-foot-long prototype alongside a 45-foot prototype. Using wind-tunnel design, the company predicted similar fuel efficiency gains that were seen with the streamlined International ProStar semitractor.
Following the two prototypes, IC Bus abandoned its efforts in the motorcoach segment, concentrating its commercial buses on school bus derivatives and the HC-Series.