xabmerge: 'xabmerge' produces 't-x' trajectories for a pair of lead and...
In cartools: Tools for Understanding Highway Performance

xabmerge produces t-x trajectories for a pair of lead and following vehicles.

1	xabmerge(df1, df2, leff, step, k, type)

`df1`	leading vehicle, a matrix
`df2`	following vehicle, a matrix
`leff`	vehicle length, a number
`step`	time-step size, a number
`k`	counter, a number
`type`	logical for plotting where TRUE creates a plot

The xabmerge, a wrapper function for bmfree2, xabparam and hsafe, returns a smooth hsafe rule t-x trajectory. for the following vehicle. The lead vehicle trajectory is not affected. Incidentally, inputs df1 and df2 were created with bmfree2 and used for testing.