@parislouiseex there is an open bug report in the bugs section here:
https://answers.ea.com/t5/Bug-Reports/OPEN-XB1-PS4-Crashing-when-Traveling/m-p/8752308
If you'd like to go to the first post on page 1 and click Me Too on the first post and add a reply if you'd like to do so.
Sometimes crashing can happen when the game is getting a bit full. So you can try a few things to clear some storage too and see if that helps. For example if you have a lot of save files that can cause issues with crashing and loading. You can also try clearing your library, I keep mine mostly empty. Check Other Households and clear some Townies, I do this every day after playing as the game generates more when travelling to a public lot. Clear the personal and household inventories of any previously played Sims and households.
I'm also adding the troubleshooting steps here for you:
Hope this helps!
Community Manager
