Joel N. Weber II
Engineer
That probably mostly depends on the radius of curves encountered.
It also depends how how closely the tracks are spaced and how much money Caltrain is willing to spend on maintaining the tracks to high speed standards and what the capabilities of the signaling system are and what the maximum speed of the equipment used for the Baby Bullet is and the quality of the crossings of automobile roads and maybe some other things I'm forgetting.
But curve radius is often not something you can easily throw money at fixing if there happen to be a large quantity of buildings in the place where you might want a large radius curve, whereas most of the rest of the factors are pretty much a simple matter of money.
It also depends how how closely the tracks are spaced and how much money Caltrain is willing to spend on maintaining the tracks to high speed standards and what the capabilities of the signaling system are and what the maximum speed of the equipment used for the Baby Bullet is and the quality of the crossings of automobile roads and maybe some other things I'm forgetting.
But curve radius is often not something you can easily throw money at fixing if there happen to be a large quantity of buildings in the place where you might want a large radius curve, whereas most of the rest of the factors are pretty much a simple matter of money.