RSZA did not say תפילת הדרך when he traveled from Yerushayim to Bnei Brak. He explained his reasoning as follows:
- In many places it is not considered as if you left the ישוב for the following reasons:
- There are many other cars on the road
- The police regularly patrol the road
- There are houses on the side of the road
- Traveling by car/bus is a normal activity. Whan a person gets up and commutes to work he does not say he is going on a trip. The takana of תפילת הדרך was for someone who was יוצא לדרך, these kinds of trips are not considered יוצא לדרך.
- There is little or no danger of לסטים וחיות רעות
RSZA reasoning is very similar to RYBS. Basically, the world has changed and it is no longer unusual or dangerous to travel between cities and therefore the din of when you say תפילת הדרך changes as well.
Note: You cannot just be machmir and say תפילת הדרך in any case, as if you are not chayav you will be saying an unneccessary beracha which is a serious aveira.