4.5.3. Capsule Stranded in Tube
"If a capsule were somehow to become stranded, capsules ahead would
continue their journeys to the destination unaffected. Capsules behind the
stranded one would be automatically instructed to deploy their emergency
mechanical braking systems. Once all capsules behind the stranded capsule had
been safely brought to rest, capsules would drive themselves to safety using
small onboard electric motors to power deployed wheels. "
That doesn't answer mrfusion's question about being in a stranded capsule for 100's of miles before the nearest exit or escape hatch.
How long does it take that electric motor to drive the stranded capsule 100's of miles to safety? With the stranded passengers stuck in a small capsule with no bathroom facilities or other amenities.
It's be first thing I thought about when the hyperloop plans were first revealed.
4.5.3. Capsule Stranded in Tube "If a capsule were somehow to become stranded, capsules ahead would continue their journeys to the destination unaffected. Capsules behind the stranded one would be automatically instructed to deploy their emergency mechanical braking systems. Once all capsules behind the stranded capsule had been safely brought to rest, capsules would drive themselves to safety using small onboard electric motors to power deployed wheels. "
http://www.spacex.com/sites/spacex/files/hyperloop_alpha-201...