The Bus That Broke GM: How the RTS Killed America’s Biggest Bus Builder
Classic Car Secrets
Dec 11, 2025
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The Bus That Broke GM: How the RTS Killed America’s Biggest Bus Builder
GM’s RTS was supposed to be the future of American transit: modular, stainless, almost space-age. Instead, it bruised GM’s budget, collided with federal policy, and became the last bus the company ever built. In this deep-dive story, we trace how one futuristic coach helped push GM out of the transit business, why drivers and agencies still loved it, and how its legacy opened the door for Flxible, Gillig, and New Flyer. Innovation didn’t fail here, misalignment did. If you rode city buses in that era, this story is yours too.
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Explore how government regulations and economic shifts impacted GM's bus production. The video details the RTS bus's innovative design and unforeseen challenges. Discover the surprising impact on the American transit landscape.
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Peter Burgess COMMENTARY
Peter Burgess
Transcript
- 0:01
- By the mid 1970s, General Motors was
- standing at a crossroads it didn't quite
- recognize yet. For more than 30 years,
- GM's old look and new look coaches had
- ruled America's city streets. If you
- rode a city bus between the 1940s and
- early '7s, odds are it was a GM. Transit
- managers knew them, mechanics trusted
- them, and drivers could handle them half
- asleep on a cold morning. But the world
- around those buses was changing. Fuel
- was no longer cheap. City budgets were
- tightening. Agencies were under pressure
- to buy coaches that were lighter,
- cleaner, and cheaper to run per mile. In
- Washington, the EPA and DOT were
- tightening the rules, while UMTA was
- pushing hard for a new generation of
- advanced design buses with fresh
- technology and better accessibility. The
- government's big trans bus dream had
- mostly fallen apart, but the political
- pressure it created didn't go away. UMTA
- 1:03
- drew up ADB standards and made it very
- 1:05
- clear federal money would favor only a
- 1:08
- few designs that met those specs. GM
- 1:11
- could either build one of them or slowly
- 1:13
- watch its transit market slip away.
- 1:16
- That's the moment when the RTS stopped
- 1:19
- being just a new model and became a
- 1:21
- highstakes bet for GM's future. When GM
- 1:24
- unveiled the RTS, they didn't present it
- 1:27
- as just another city bus. They pitched
- 1:30
- it as the machine that would drag
- 1:31
- American transit into the future. At the
- 1:34
- heart of the design was a bold idea.
- 1:37
- Build the body in 5-ft stainless steel
- 1:39
- modules that could be linked together to
- 1:41
- create 30, 35, or 40ft coaches without
- 1:46
- redesigning the whole structure. Those
- 1:48
- modules carried smooth composite panels,
- 1:51
- curved glass, and a flowing profile that
- 1:54
- looked nothing like the boxy buses
- 1:56
- Americans were used to. On the street,
- 1:58
- an RTS didn't just show up, it arrived,
- 2:02
- looking almost space age against the
- 2:04
- brick and concrete of a 1970s city. GM
- 2:08
- layered in technology that for 1977
- 2:11
- bordered on ambitious. A kneeling system
- 2:14
- allowed the curbside to drop for older
- 2:16
- riders or passengers with limited
- 2:18
- mobility, something agencies had been
- 2:21
- asking for, but rarely received. The
- 2:24
- interior layout hinted at a semi- low
- 2:26
- floor years before that idea became
- 2:29
- industry standard. And because the body
- 2:31
- was modular, GM promised quicker
- 2:34
- accident repairs and lower long-term
- 2:36
- maintenance costs. To GM, the RTS wasn't
- 2:40
- an evolution of the new look. It was the
- 2:43
- bus that would replace it entirely, a
- 2:45
- leap 20 years ahead of its time. And for
- 2:48
- a moment, many people believed it. For
- 2:51
- all its futuristic promise, the RTS
- 2:54
- carried a set of technical headaches
- 2:56
- that drained GM's budget and patience.
- 2:59
- The most serious began with a single
- 3:02
- design decision that looked clever on
- 3:04
- paper, but unraveled in realworld
- 3:06
- service. the placement of the AC
- 3:09
- condenser inside the engine compartment.
- 3:12
- In hot climates, that choice proved
- 3:15
- brutal. The radiator and condenser sat
- 3:18
- inches apart, each dumping heat into the
- 3:20
- same narrow space. Engines ran hot,
- 3:23
- transmissions ran hotter, and mechanics
- 3:26
- spent their summers chasing temperature
- 3:28
- problems that simply wouldn't go away.
- 3:31
- Transit shops discovered that the
- 3:33
- condenser needed to be washed out weekly
- 3:35
- during peak season, an added labor cost
- 3:38
- no one had budgeted for. By the early8s,
- 3:41
- cities like Detroit, Baltimore, and San
- 3:44
- Antonio were retrofitting their fleets,
- 3:47
- relocating components just to keep
- 3:49
- coaches on the road. Weight was another
- 3:52
- burden. The stainless steel modules and
- 3:55
- composite panels made the RTS
- 3:57
- structurally impressive, but also
- 3:59
- heavier than the new look it was meant
- 4:01
- to replace. That extra mass combined
- 4:05
- with the modular layout created a new
- 4:07
- issue. Even a relatively minor accident
- 4:10
- could damage a specific module, and
- 4:13
- repairing it often took more time and
- 4:15
- skill than fixing the monoc shells
- 4:17
- mechanics had worked on for decades. In
- 4:20
- more than one maintenance garage, the
- 4:22
- RTS earned a mixed reputation. Modern,
- 4:26
- but not exactly shop friendly.
- 4:29
- Accessibility features brought their own
- 4:31
- quirks. The rear door wheelchair lift
- 4:34
- satisfied federal expectations, but
- 4:37
- complicated everyday operations. The
- 4:39
- driver had to stop, unload, or secure
- 4:42
- passengers near the back, inch the coach
- 4:45
- forward, and then run the lift sequence.
- 4:48
- During rush hour in northern cities,
- 4:50
- early electrical systems sometimes
- 4:53
- struggled with moisture and road salt,
- 4:55
- adding another layer of frustration.
- 4:58
- Yet, it's important to keep perspective.
- 5:01
- The RTS was not another Grumman 870. It
- 5:05
- didn't suffer catastrophic frame
- 5:06
- failures or nationwide grounding orders.
- 5:10
- What it did suffer from was a mismatch
- 5:12
- between its innovative design and the
- 5:14
- realities of American transit in the
- 5:16
- late 70s and early 80s. It was a good
- 5:20
- bus, just not a bus the system was ready
- 5:23
- to handle efficiently. If the
- 5:25
- engineering challenges bruised GM, the
- 5:28
- policy environment finished the job.
- 5:31
- Under UMTA's rules, federal money flowed
- 5:34
- primarily to buses that met the new
- 5:36
- advanced design bus ADB standards. In
- 5:40
- the beginning, that short list included
- 5:42
- only two models, the RTS and the Grumman
- 5:46
- 870. On paper, that looked like an
- 5:49
- advantage for GM. In practice, it became
- 5:51
- a vice. Agencies that relied on federal
- 5:55
- grants had only a couple of choices,
- 5:57
- which meant GM had to deliver large
- 5:59
- orders quickly and deliver them
- 6:01
- flawlessly under a level of scrutiny no
- 6:04
- earlier GM bus had ever faced. Then came
- 6:07
- the second squeeze, low bid procurement.
- 6:11
- Cities were required to choose the
- 6:13
- lowest qualifying bid, which kept
- 6:15
- purchase prices down, but left almost no
- 6:18
- profit margin for manufacturers.
- 6:20
- GM had poured millions into R&D for the
- 6:23
- RTS and the math simply didn't work.
- 6:27
- Every retrofit, every warranty claim,
- 6:30
- every condenser relocation or heat
- 6:32
- related repair landed squarely on GM's
- 6:36
- books. Instead of paying off the
- 6:38
- investment, the RTS began accumulating
- 6:41
- losses, death by a thousand invoices.
- 6:44
- When the Grumman 870 collapsed under its
- 6:47
- A-frame scandal, agencies across the
- 6:50
- country rushed to replace their
- 6:51
- sidelined fleets, many turned to the RTS
- 6:55
- because it was the only other UMTA
- 6:57
- approved ADB design. What sounded like a
- 7:01
- windfall became another burden. GM now
- 7:04
- had to build and deliver buses even
- 7:06
- faster while simultaneously correcting
- 7:09
- early production issues. More volume
- 7:12
- didn't mean more profit. It meant more
- 7:14
- warranty exposure. And the pressures
- 7:17
- didn't stop there. Labor costs at GM's
- 7:19
- Pontiac plant were high. Truck and Coach
- 7:22
- was a small division inside a corporate
- 7:25
- giant fighting larger battles in cars
- 7:27
- and trucks, making it hard to secure
- 7:30
- long-term investment. Worst of all, the
- 7:33
- US transit market simply wasn't growing
- 7:35
- fast enough to absorb the RTS's heavy
- 7:38
- development costs. In the end, the
- 7:41
- system GM was trying to serve was the
- 7:43
- very system that made the RTS
- 7:45
- unsustainable.
- 7:47
- Here's the part of the story that often
- 7:49
- surprises people. Once the early heat
- 7:51
- management issues were corrected, many
- 7:54
- agencies genuinely liked the RTS.
- 7:57
- Los Angeles ran them for decades.
- 8:00
- Houston and Boston kept large fleets on
- 8:02
- the road well into the 1990s. and New
- 8:05
- York City, always a demanding customer,
- 8:08
- would eventually purchase thousands of
- 8:10
- RTS coaches from TMC and later Novabus.
- 8:15
- In daily service, the RTS earned a
- 8:18
- reputation for riding smoothly, looking
- 8:21
- modern, and resisting corrosion thanks
- 8:23
- to its stainless steel frame. For a lot
- 8:26
- of drivers and riders, it was one of the
- 8:28
- best looking and best driving city buses
- 8:31
- of its era. The problem wasn't the bus.
- 8:34
- The problem was the bill. GM had spent
- 8:37
- heavily to develop the RTS. Yet each
- 8:40
- unit sold under federal low bid rules
- 8:43
- produced only a razor thin margin. Every
- 8:47
- warranty repair, every retrofit
- 8:49
- campaign, every field modification dug
- 8:53
- the hole a little deeper. At the same
- 8:55
- time, GM as a whole was entering a
- 8:58
- period of major restructuring. resources
- 9:01
- were being pulled toward cars, trucks,
- and emerging global markets. A transit
- bus division that required high
- investment and delivered low returns no
- longer made strategic sense to Detroit's
- top leadership. So, the truth lands
- here. The RTS was a good product caught
- in the wrong economic moment. Had the
- timing been different or the market
- 9:25
- larger, GM might have stayed in the
- 9:27
- game. But in the early 1980s, the RTS
- 9:31
- was a bus GM simply couldn't afford to
- 9:33
- keep raising. By 1986, the writing was
- 9:37
- on the wall. After years of slim
- 9:40
- margins, warranty costs, and a corporate
- 9:43
- leadership increasingly focused on
- 9:44
- automobiles and global competition, GM
- 9:47
- announced it would exit the bus business
- 9:49
- entirely. The official explanation was
- 9:52
- simple. Transit coaches were no longer a
- 9:54
- strategic priority, and the division
- 9:57
- wasn't generating the returns a company
- 9:59
- of GM's size needed to justify continued
- 10:02
- investment. Inside the industry, though,
- 10:04
- the news landed like a thunderclap. For
- 10:07
- four decades, if you talked about
- 10:09
- American city buses, you were talking
- 10:11
- about GM. Then came 1987, the year the
- 10:15
- curtain fell. GM formally shut down its
- 10:18
- truck and coach division and sold the
- 10:20
- rights to both the RTS and the Classic
- 10:23
- to Motorcoach Industries, which created
- 10:25
- the TMC plant in Roswell, New Mexico to
- 10:28
- continue production. Just like that, an
- 10:31
- era ended. The company that had shaped
- 10:33
- nearly every major transit fleet in the
- 10:36
- United States, stepped away, leaving
- 10:38
- behind a gap no manufacturer would ever
- 10:41
- fill in quite the same way. The impact
- 10:44
- was felt far beyond balance sheets. In
- 10:47
- Detroit, the loss hit home. Truck and
- 10:49
- coach had been more than a factory. It
- 10:51
- was a symbol, one of the many industrial
- 10:54
- pillars that helped define the city's
- 10:56
- identity. The closure was another
- 10:58
- reminder that the old American
- 11:00
- manufacturing landscape was shifting,
- sometimes painfully, into something new.
- And here lies the irony at the heart of
- this story. GM created the RTS, poured
- its future into it, and then walked away
- just as the bus was maturing into its
- own success. The RTS didn't kill GM's
- bus division, but it did become the last
- chapter in a legacy that had shaped
- American transit for nearly half a
- century. What makes the RTS story almost
- poetic is what happened after GM walked
- away. TMC, created under Motorcoach
- Industries, kept the design alive,
- refining it into the RTS 2, 3, and 4
- through the 1990s and into the early
- 2000s. When Novabus later took over, the
- platform continued to serve some of the
- biggest transit fleets in the country.
- Nowhere was its presence stronger than
- in New York City, which ultimately
- purchased nearly 4,900
- RTS coaches, a number so large it turned
- 12:01
- the design into a rolling landmark
- across all five burrows. Through those
- years, the RTS became exactly what GM
- had hoped it would be, a dependable
- workhorse and an unmistakable silhouette
- on American streets. And that's the
- irony. GM paid the highest price to
- create the RTS, absorbing the
- development costs, the early bugs, and
- the political pressures. Yet, the
- long-term success, the era in which the
- RTS truly proved its worth, belonged to
- TMC and Nova, not to the company that
- brought it into the world. In the end,
- the RTS left behind a legacy far more
- complicated and far more meaningful than
- the headlines of the 1980s ever
- suggested. From a technical standpoint,
- it pushed American transit design
- forward, introducing modular
- construction, stainless steel framing,
- and early accessibility features that
- would influence bus engineering for
- decades. It proved that a city coach
- 13:02
- could be both forward-looking and
- durable, even if the industry wasn't
- quite ready for everything it offered.
- But the business story told something
- different. The RTS showed what happens
- when a giant corporation pours heavy R&D
- into a small, tightly regulated market
- where federal rules, low bid
- procurement, and slim margins collide.
- Under those conditions, even a strong
- product can become a financial burden.
- GM didn't leave Transit because the RTS
- failed. GM left because the system made
- long-term success nearly impossible for
- a company its size. History adds the
- final twist. The RTS lived on for 20
- years, proving it was never a flawed
- design. It was simply a bus born into
- the wrong family. And when GM stepped
- away, that exit opened the door for
- Flexible, Gillig, and New Flyer to rise
- into the space GM once dominated. If
- 14:00
- there's one lesson the RTS leaves us,
- it's this: innovation doesn't fail.
- Misalignment does. A good idea placed in
- the wrong ecosystem can only carry a
- company so far.
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