Brightline is a pertinent case study for us in Canada because its current operations are very similar to the proposed operations under Via Rail’s High Frequency Rail proposal. It has hourly service which primarily uses existing railways upgraded to permit speeds of up to 110 mph (177 km/h), as well as a small amount of new 125 mph (201 km/h) railway to fill gaps. It even uses the same Siemens Charger locomotives and Siemens Venture coaches as Via!
To see how much Brightline’s 200 km/h top speed contributes to its high average speed, I measured train speeds along the Orlando Line, which is the new 200 km/h railway alongside State Route 528 which connects the existing Florida East Coast railway to Orlando. This 60 km railway is the only portion of the 380 km corridor which is grade separated and thus the only portion where trains can reach their 200 km/h top speed.
I cross-referenced the distances between landmarks such as bridges and buidings with the times where they appeared in
this video by the Roaming Railfan to produce a speed profile throughout the video
(raw data here):
Since the measurements were from one location to another, the speed profile is a series of averages rather than instantaneous measurements, so it is not very accurate for portions where the train is accelerating or decelerating. In the westbound video the train slowed down near the Dallas Toll Plaza, but in the eastbound video it did not. The slowdown is therefore not due to a track speed restriction and I have ignored it in the following diagrams.
Based on the speed profile, here is my best guess as to the speed limits along the new railway.
Orlando line from the FEC railway (right side of image) to I-95 (left side of image)
Heading from east to west, trains diverge from the Florida East Coast Railway and are limited to about 60 mph (97 km/h) through the sharp curve under State Route 528. Trains accelerate to about 80 mph (129 km/h), but then need to slow to 70 mph (112 km/h) for the curves near I-95 where the railway also crosses to the south side of SR528.
Orlando line from I-95 to CP Orlando west
From Pine Street to Control Point (CP) Orlando West (which is confusingly east of Orlando), trains can cruise at their top service speed of 125 mph (201 km/h).
Orlando line from CP Orlando West to Orlando station
At CP Orlando West, the line widens from single-track to double-track. Trains switching tracks need to slow to 80 mph (129 km/h), and that is the case for the train in the westbound video. Although the 80 mph turnout speed does restrict speeds, it is far better than the 45 mph (72 km/h) turnout speed which is typical in Canada.
West of CP Orlando West, trains are limited to about 90 mph (145 km/h) due to a series of curves around interchanges such as SR417 and Narcoossee Road.
The final stretch into Orlando Airport includes many sharp curves, and trains stay below 35 mph (56 km/h).
In total trains exceed 110 mph for 9 minutes out of the 205-minute trip (5% of the time), during which they cover 29 km out of 378 km (8% of the distance). If trains were limited to 110 mph, it would only add 1 minute to the travel time. Based on this fact, I don’t think that Brightline can accurately be described as a high-speed rail service.
The main reason that Brightline is able to achieve a higher average speed than any other conventional train in North America is that the project included extensive upgrades to the existing FEC railway, including realigning curves, upgrading level crossings and fully double-tracking the line. As far as we can tell, the FECR is very supportive of Brightline, and they dispatch their freight trains such that they do not impede Brightline’s passenger trains.
___
The above was an excerpt from my blog post '
How fast is Brightline?'