Editing IC Bus (section)

==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  As Caterpillar has withdrawn from producing diesel engines for the school bus market, the Forward Advantage will not see production in its current form since its design was tailored to the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.{{Citation needed|date=November 2023}}

=== 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%{{Dubious|date=October 2013}} better fuel economy<ref name=PR-080725>{{cite press release |url=http://ir.navistar.com/releasedetail.cfm?releaseid=324455 |title=California's Newest Green Product - A Hybrid School Bus - Saves Fuel, Reduces Emissions |date=25 July 2008 |publisher=Navistar |access-date=3 January 2018 |quote=After one school year and 13,000 miles, [Ralph Knight, transportation director at Napa Valley School District] was pleasantly surprised to learn that the fuel efficiency of the hybrid bus helped him reach close to 13 miles per gallon -- nearly double the fuel efficiency of a typical diesel school bus. [...] Traveling about 65 miles per day, the hybrid bus typically transports roughly 60 children each morning and 60 each afternoon through a mixed route of highway and city driving. |archive-url=https://web.archive.org/web/20180104073254/http://ir.navistar.com/releasedetail.cfm?releaseid=324455 |archive-date=January 4, 2018 |url-status=dead }}</ref><ref name=CE-Hybrid /> but cost about two and a half times more than a standard diesel bus ($210,000 versus $80,000).<ref>{{cite web|url=http://www.advancedenergy.org/corporate/initiatives/heb/phase4.php |title=Plug-in Hybrid Electric School Bus, Project Phases - Phase IV |date=29 September 2007 |access-date=February 19, 2017 |publisher=Advanced Energy |url-status=dead |archive-url=https://web.archive.org/web/20070929102710/http://www.advancedenergy.org/corporate/initiatives/heb/phase4.php |archive-date=September 29, 2007 }}</ref><ref>{{cite press release |url=https://www.businesswire.com/news/home/20100427005591/en/Fourth-Graders-Win-Hybrid-Bus-School-Nation |title=Third and Fourth Graders Win Hybrid Bus for Their School as Nation Selects 'America's Greenest School |date=27 April 2010 |publisher=Business Wire |access-date=3 January 2018}}</ref>

[[Enova Systems]]<ref>{{cite web|url=http://www.enovasystems.com/ |title=Enova &#124; Electric, Hybrid Electric and Fuel Cell Drive Systems |website=Enovasystems.com |date=2011-12-31 |access-date=2016-03-09}}</ref> entered into a long-term supply agreement with IC Bus<ref>{{cite web|url=http://www.greencarcongress.com/2008/05/enova-systems-a.html |title=Enova Systems and IC Bus Execute Long Term Agreement For Hybrid School Buses |publisher=Green Car Congress |date=2008-05-20 |access-date=2016-03-09}}</ref> that guarantees that Enova's proprietary Post Transmission Parallel Hybrid Electric drive system will be used in IC Bus' hybrid electric school buses.<ref name=PR-080725 /> The hybrid school bus project features Enova's charge depleting (or "plug-in") 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.<ref name=CE-Hybrid>{{cite web|url=http://www.icbus.com/ICCorp/BusDownloads/School%20Route/CE%20Series%20Hybrid%20Sell%20Sheet.pdf |title=CE Series Hybrid Sell Sheet |date=2009 |publisher=IC Bus |access-date=April 26, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20101231211526/http://www.icbus.com/ICCorp/BusDownloads/School%20Route/CE%20Series%20Hybrid%20Sell%20Sheet.pdf |archive-date=December 31, 2010 }}</ref> As Enova went Bankrupt in 2014, IC Bus has discontinued the Hybrid option, once again leaving the CE with the Diesel Powertrain option.<ref>{{Cite news |last=Fine |first=Howard |title=Electric Vehicles' Latest Breakdown |work=Los Angeles Business Journal |url=https://labusinessjournal.com/news/weekly-news/electric-vehicles-latest-breakdown/}}</ref>

===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.<ref name=":0">{{Cite press release |url=http://ir.navistar.com/releasedetail.cfm?releaseid=338771 |title=IC Bus Announces Plans to Enter Motorcoach Market in 2010 (NYSE:NAV) |date=6 October 2008 |website=Navistar |access-date=2016-09-26 |archive-url=https://web.archive.org/web/20161022055236/http://ir.navistar.com/releasedetail.cfm?releaseid=338771 |archive-date=October 22, 2016 |url-status=dead }}</ref>  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.<ref name=":0" />

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 (a cutaway variant of the International DuraStar).