I believe that if the track is spral and the it curves left the ball will continue to keep curving
One experiment used in Physics is a ball rolling down a spiral track. When the ball gets to the end, it will go straight off because the curve of the track is gone.
There are many different types of transition curves but...'Transition Curve', a simple tool used to understand the sorts of issues people might be facing during changeA track transition curve, transition spiral, or spiral easement, is a mathematically calculated Euler spiral fitted between a straight (also known as tangent) and a circular curve on a section of rail track or highway.Website-- http://en.wikipedia.org/wiki/Track_transition_curve--Sillypinkjade------
The rear track of the 2007 Rolls-Royce Phantom is 5 ft. 5.7 in. (65.7 in.).
The front track of the 2012 Rolls-Royce Phantom is 5 ft. 6.4 in. (66.4 in.).
The front track of the 2009 Rolls-Royce Phantom is 5 ft. 6.3 in. (66.3 in.).
The front track of the 2012 Rolls-Royce Ghost is 5 ft. 3.9 in. (63.9 in.).
The front track of the 2013 Rolls-Royce Phantom is 5 ft. 6.4 in. (66.4 in.).
The rear track of the 2010 Rolls-Royce Phantom is 5 ft. 5.8 in. (65.8 in.).
The rear track of the 2012 Rolls-Royce Ghost is 5 ft. 5.4 in. (65.4 in.).
The front track of the 2008 Rolls-Royce Phantom is 5 ft. 6.3 in. (66.3 in.).
The rear track of the 2004 Rolls-Royce Phantom is 5 ft. 5.7 in. (65.7 in.).
The rear track of the 2011 Rolls-Royce Phantom is 5 ft. 5.8 in. (65.8 in.).