This sidewalk is safe, because there is a good distance between it and the road.
This pedestrian walk is not so close to the road, so it's safe.
ご質問ありがとうございます。
① "This sidewalk is safe,"＝「この歩道は安全だ」
"because there is a good distance between it and the road."＝「なぜかというと、車道とはある程度の距離があるからだ。」
② "This pedestrian walk is not so close to the road, so it's safe."＝「この歩道は車道とあまり近くないので、安全だ。」
ご参考までに。
アメリカ合衆国 
