If chosen well, it doesn't matter because context clues usually will eliminate confusion. You're likely to know that the lake path isn't I.4 miles long and that

If chosen well, it doesn't matter because context clues usually will eliminate confusion. You're likely to know that the lake path isn't I.4 miles long and that there's no 1 in 'Ranger Station'. In cases where there likely is to be confusion, spelling numbers out can make the intention known. But of course not everyone is so careful. There was a computer magazine back in the 80s that used a typeface for program listings that used the exact same glyph for 1 and l, which often could not be determined which one was correct strictly by context. Those were frustrating to try to debug.