1. There is a dispute about whether one may acquire a field by walking over it.
2. The Gemara explains this dispute.
3. If a person is hired to build a road to be used solely for travel between two cities, he must make it 8 Amos wide.
4. A king may build any road anywhere he desires for his purposes.
5. If someone sells any part of his family burial plot, his family may force the buyer to sell it back.
A BIT MORE
1. Rebbi Eliezer: A person acquires the area he walked on (assuming that someone sold it to him or it was ownerless). Chachamim: Walking is not a method of acquiring.
2. Rebbi Eliezer: The Torah clearly states that Hashem told Avraham to "get up and walk over the land, for I have given it to you." Chachamim: This was just a way to symbolize that it will be easy for his descendants to capture the land; it was not a method of acquisition.
3. A road to a city of refuge (Arei Miklat) must be 32 Amos wide. The Torah wanted to ensure that the unintentional killer is able to escape to one of these cities with ease.
4. If the king needs a road for his troops to use on the way to war, he may even build it through a private domain of a citizen.
5. The Chachamim instituted this enactment because it is disgraceful for family members not to have a proper burial plot.