Higher-speed rail
United States
Table:
Corridor / Segment
Service name
Length (miles)
Equipment
Power
Top speed (mph)
Avg speed (mph)[80]
Note

Washington, DC–Boston, MA
Northeast Regional
457
locomotive-hauled coaches
Electric
125
57
[81] Trains run on Northeast Corridor trackage shared by high-speed Acela Express trains. This service also qualifies as high-speed rail in certain portions of its route when traveling at its maximum speed, 125 mph (201 km/h).

New York City–Albany, NY
Empire Service, Lake Shore Limited, Maple Leaf, Adirondack, Ethan Allen Express
141
locomotive-hauled coaches
Diesel-electric
110
56
[23]

Philadelphia–Harrisburg, PA
Keystone
104
locomotive-hauled coaches
Electric
110
59
[23] Improvements of grade crossings are in progress to increase speeds up to 125 miles per hour (200 km/h)[82]

New Haven, CT–Springfield, MA
New Haven–Springfield Shuttle, Vermonter, Northeast Regional
62
locomotive-hauled coaches
Diesel-electric
110
47
Amtrak services running on the New Haven–Springfield Line started operating at 110 mph (180 km/h) on June 16, 2018.[83]

Chicago, IL–Detroit/Pontiac, MI
Wolverine
304
locomotive-hauled coaches
Diesel-electric
110
57
As of 2014, a 97-mile (156 km) portion allows speeds up to 110 mph (180 km/h). Another portion of 135 miles (217 km) is under construction to increase to those speeds.[23][84]

Chicago, IL–Port Huron, MI
Blue Water
319
locomotive-hauled coaches
Diesel-electric
110

As of 2014, a 97-mile (156 km) portion allows speeds up to 110 mph (180 km/h).[84][85]

Chicago, IL–St. Louis, MO
Lincoln Service
284
locomotive-hauled coaches
Diesel-electric
110

Chicago, IL–Los Angeles, CA
Southwest Chief
2,256
locomotive-hauled coaches
Diesel-electric
90
55
[86]

Los Angeles–San Diego, CA
Pacific Surfliner
130
locomotive-hauled coaches
Diesel-electric
90
55
[23] There is a study in place to increase maximum speed to 110 mph (180 km/h) when funding is available.[87]

Considering the tabular data covering 'Higher-speed rail' in the 'United States' section, summarise the highlighted cells in a single sentence and return it as JSON: {"answer": "YOUR ANSWER"}.