The pedicab involved in the Seattle accident appears to be very similar to the ones being sold by the Cascadia Cab Company on their site here:

http://www.cascadiacabs.com/pb/wp_729c7b78/wp_729c7b78.html

The pedicab involved in the accident seems to differ in that the  cabs for sale on their website in that the cab in the accident appears to be a single speed model and has no hand brake installed on the right side of the handlebar.  It is difficult to tell from the photo below if there is a left hand brake installed.

In the United States, the right hand brake is normally used to stop the rear wheel of a bicycle or pedicab, and the left hand lever is traditionally used to stop the rear wheel(s).   Both pedicabs pictured have a parking brake lever.  It appears that the parking brake lever actuates a band brake mounted to the rear axle of the pedicab.  Other differences that are evident include the front fork and tires.  The front fork on the pedicab involved in the accident appears to be a “springer” type fork that does not have a disc brake mounted to it.

While reviewing the pictures of the pedicabs pictures on the cascadiacabs.com “Seattle” page all of the cabs pictured have both right and left hand brakes and suspension forks with disc brakes mounted to them.

The fork and brakes mounted on the pedicab involved in the accident appears to be similar to the one found on this pedicab:

The owner of the above pedicab has a blog talking about it and the improvements he has made to it found here:

http://www.rickshawseason.com/

The cab in the accident looks agreat deal like a stock Chinese import cab, with out any improvements to the drive train or brakes to be able to deal with the steep hills of downtown Seattle.