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defaulticus.bsky.social
defaulticus
@defaulticus.bsky.social
18 followers 25 following 22 posts
I am defaulticus.
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defaulticus.bsky.social
And another graph of train speed and distance.
Graph depicting train speed and distance between San Antonio Texas and Austin Texas. Speed is shown in blue and varies, with the highest speeds on the right of the graph (near the end of the trip). Distance is shown in red and increases monotonically. The slope is steepest where the blue speed trace is highest. The slope is zero in three places where the speed is zero.
January 19, 2026 at 8:39 PM
defaulticus.bsky.social
Also closeups.
Closeup color velocity plot map of the San Antonio area. Closeup color velocity plot map of the New Braunfels and San Marcos areas. Closeup velocity plot map of the Austin area.
January 19, 2026 at 8:35 PM
defaulticus.bsky.social
I recorded another Amtrak trip to Austin and plotted our speed on the map this time.
Color plot of train velocity over a map of central Texas, tracing the route of the train. The map indicates speeds varying from 0 to 70 mph, with low speeds in the cities and higher speeds in unbuilt up areas.
January 19, 2026 at 8:33 PM
defaulticus.bsky.social
Merry Xmas to the digital void!
December 25, 2025 at 2:37 PM
defaulticus.bsky.social
I took the train from Austin to San Antonio last night, and GPS recorded the trip.
September 29, 2025 at 6:49 PM