DropETA
DropETA plans a run of deliveries and shows what adding one more stop does to the rest.
Independent prototype development. TypeScript, routing services and browser UI.
A duration matrix gives the ordering something to compare, so the useful part isn't adding an address, it's reordering the stops around it and recalculating when each one lands. Adding a stop previews where it fits before you commit.
The interface is further along than the routing. Both work, though the routing is the part I'd rebuild.
State
A working prototype with stop ordering and insertion previews.