I have been through this dilemma - 9 years ago I moved here from a farm cottage with 2 cats who were used to livery and farm traffic but the main road was half a mile across the fields and the woods behind us were far more appealing

Both (girls) died here about 2 and 3 years after moving. At first they came and went freely but after the first one died overnight on the road, I made the other come in at night as while the traffic is busy in the daytime, it is more tempting to cross after dark when it's quieter and they're harder to see and unlikely to get slowed down for

The second one went also overnight on the one night I had food poisoning and couldn't find her to get her in between visits to the loo

I said no cats as a result and lived without for 4 years, but the mice moved in and by the time I had them running across the living room floor of an evening with me in the room

I couldn't bear it anymore so I got 4 kittens, 2 girls and 2 boys, from a friend who were needing homes, and decided they'd be indoor cats. That lasted 6 months by which time I couldn't bear that either - they would sit at the windows "talking" to the birds and whining to be out, meanwhile pulling wallpaper off, scratching furniture etc and the thundering of tiny paws at night was something to hear!
So with trepidation I started letting them go out during the day - with mixed results. Both boys were lost at the age of 2-3yo in broad daylight, one crossing the road to come to me because he heard me talking with the farrier in the field I think, I was literally 100 yards away

The other would often stay out at night and the catsitter couldn't get him in while I was away but he was knocked over (black longhair) in the ice last winter tho the driver did stop to bring him in he said he saw him and simply couldn't brake enough in the weather conditions

The 2 girls are still here and going strong (touch wood) as are 2 of the kittens I kept from 2 litters so they're just under and just over a year at this point. I live in anxiety of something happening but with animals of any kind I have come to realise that giving them a quality of life and enjoying every day with them knowing there may not be another, is the key to sanity

They may be hit, they may not, but I am mouse free, have cat company, they love their lives and live it to the full, climbing trees, the barn roof, and I do my best for them but can't protect them all the time..
I would have cats here again if I lost them, just as I would still have ponies having lost one in a tragic field accident and could lose another for some reason at some point, tomorrow or in 10 or 15 years time. Having animals they always have shorter lives than us (accident to ourselves notwithstanding) so you will always have to say goodbye and the ones I've lost I have also loved and I wouldn't have missed that for the world

Next door have been there for 18 years and lost 6 cats, had 4 to old age and 1 still going at 16 tho barely out the door nowadays. I guess their chances are 50/50..
PS the 30mph zone is 100 yards west of my gate, and another 300 yards further is a tight double bend - but as an A road the majority of traffic is already at 60 for that stretch and some way more - we often have motorbike crashes at the far end where they don't make the double bend at 100mph
