Photo: P. Applegate
The wait is over! It’s time for the first Unlocked piece of 2025!
Believed to be the world’s only surviving tunnel clearance car, the B&O No. CE-15 Tunnel Clearance Car marks a pivotal time of innovation and civil engineering. During the 20th century, the size of locomotives and freight cars increased and so arose a need to measure the sizes of bridges and tunnels.
The CE-15 was the only clearance car constructed by the B&O and was created by placing the body of a caboose on a flat car and adding 67 quills. Quills on this car would allow crew to measure the size of the tunnel by flexing against pressure.
Get ready to kick off 2025’s Unlocked with the CE-15 and mark your calendar for more of history’s most iconic rolling stock.
Tours:
Tours will be available between 10 AM – 4 PM.
Please note: This tour requires participants to climb stairs and walk on uneven pathways. For a completely physically accessible experience please see our virtual tour. Docent Tour Guides stationed near the car can answer any additional questions about the history and physical description of the car. Small children must be accompanied by an adult guardian at all times.
Admission:
Included with Museum Admission. FREE for Museum Members.
More about the B&O Unlocked Series
America 250: Unlocked
Celebrate America’s Story—One Railcar at a Time
The National Museum of Railroad History & Innovation’s annual Unlocked series returns—this year with a special tribute to America’s 250th anniversary. Each month, step inside a different piece of rail history and experience the stories that helped build a nation. In honor of this milestone, American Freedom Train No. 1 will be opened twice in 2026—January and July—offering a rare chance to celebrate the spirit of freedom and innovation that defines America’s rail legacy.
You’ll also have the opportunity to step inside the newly restored B&O No. 3316 “Washington” Observation Tavern Car.
Become a B&O Member and receive free admission for each collection piece. Don’t miss this opportunity to unlock the doors on these historic pieces!
Step inside the complete 2025 series!
B&O No. CE-15 Tunnel Clearance Car
January 15, 18 & 19
The CE-15 is believed to be the world’s only surviving tunnel clearance car and serves as a testament to a pivotal moment in locomotive design.
B&O No. CE-10 Electric Switcher
February 19, 22 & 23
The B&O No. CE-10 worked on the small rail network of Fells Point to keep Baltimore industry moving.
GC&E No. 1 “Shay”
March 19, 22 & 23
The GC&E No. 1 “Shay” is an asymmetrical engine designed to navigate the uneven tracks and sharp curves of logging country.
B&O No. X-4055 Camp Car
April 16, 19 & 20
The B&O No. X-4055, also known as the B&O No. 4723 and nicknamed “Thendara,” was originally constructed as a sleeper car and later refashioned to serve as a Maintenance-of-Way (MOW) camp car in the 1960s.
B&O No. C-2943 Caboose
May 21, 24 & 25
The B&O No. C-2943 is an example of an I-7A caboose, which is known for its steel body and protruding bay windows.
B&O No. 3684
June 18, 21 & 22
The B&O No. 3684 was the first locomotive to arrive to the B&O Railroad from a purchase of 16 GP-40 diesel-electric engines.
WM 195 Switcher
July 16, 19 & 20
The WM No. 195 is a multi-purpose engine made to travel as fast as a mainline locomotive and was used for over two decades to pull heavy coal trains.
B&O No. B-29 Jordan Spreader
August 20, 23 & 24
The B&O No. B-29 is a “Jordan Spreader,” a type of maintenance car that is considered by some to be the earliest type of railroad maintenance equipment.
B&O No. 633 Switcher
September 17, 20 & 21
The B&O No. 633 is a diesel switcher of the SW-900 model that still occasionally operates at the museum.
B&O No. 3302 “Edward G. Hooper” Observation Lounge
October 15, 18 & 19
The B&O No. 3302 “Edward G. Hooper” Observation Lounge, serves as a reminder of luxury passenger service and traveled with the Royal Blue and the Ambassador.
B&O No. C-1775 Bobber Caboose
November 20, 22 & 23
A staple of railroad imagery, “bobbers” served as business offices, mobile lookout towers, and sleeping quarters.
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“The Underground Railroad exhibit particularly made an impression. You can learn about the enslaved people who passed through Mount Clare Station as their last stop before reaching the northern states. Sobering and inspiring stories.”
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