この公園は車が入らないから安全だね。
kono kouen wa kuruma ga hairanai kara anzen da ne.
No cars come into this park, so it's safe. casual
新しい橋ができて、通学路が安全になりました。
atarashii hashi ga dekite, tsuugakuro ga anzen ni narimashita.
A new bridge was built, and the route to school became safe. neutral