So helpful to read the info about taxis marked for routes outside of the local area. Although I haven't had rides in any, I have seen such vehicles in Negril. They caught my attention but at the time I couldn't put my finger on it. Now that this incident has happened I understand what my brain was trying to tell me: this is something I haven't learned about and take notice not to venture where I do not know.

On the topic of charters: there is a (red plate JTB) charter van driver by ValueMaster I have used many times to carry me back after I have completed my errands in town. Recently I wasn't feeling up to par so I had him pick me up and wait while I shopped at each location. I was amazed how much faster, easier and less-tiring it was to get through my list, which more than made up for the reasonable (but additional to my budget) cost.

I know it can get to feeling expensive for 1-2 people to use a charter driver but as has been noted earlier in this thread, what you 'save' in personal wear-and-tear really is worth it.