Why is 街に歩く not grammatical?


I have read
[this](https://japanese.stackexchange.com/questions/38603/is-%E7%A7%81%E3%81%AF-%E6%98%8E%E6%97%A5%E8%A1%97%E3%81%AB%E6%AD%A9%E3%81%8F-correct),
[this](https://japanese.stackexchange.com/questions/2166/cant-%E3%81%AB-
always-replace-%E3%81%B8/2167#2167) and
[this](https://japanese.stackexchange.com/questions/80/when-going-somewhere-
is-there-any-difference-between-e-%E3%81%B8-and-ni-%E3%81%AB), but I still do
not understand why 「街{まち}に歩{ある}く」 is not grammatical.

The person who wrote this wanted to say "I will walk to town".




According to a classic explanation, "pure motion verbs" such as 行く, 来る, 動く, 入る
and 移動する can take both ～に and ～へ, but "motion manner verbs" such as 走る, 泳ぐ, 歩く
and 飛ぶ tend not to take ～に. Verbs in the latter group do not even need a
destination (e.g., 部屋をうろうろと歩く, プールで泳ぐ, 空を飛ぶ).

[「駅に行く」が言えるのに、「駅に歩く」と言えないのはなぜ？](http://www.alc.co.jp/jpn/article/faq/03/214.html)

That said, there are many cases where ～に is used with 歩く/走る/飛ぶ. This is
extensively discussed in [this
article](https://www.agulin.aoyama.ac.jp/mmd/library01/BD90039154/Body/link/y60u0031-057.pdf).
The author says that when the manner of a motion or a situation is more
focused than the motion itself, ～に歩く tends to be more tolerated. ～に走る/～に飛ぶ
tends to be tolerated when the cause of the action is unexpected and urgent.

>   * 考え事をしながら駅に歩いている途中で、突然友達に出会った。
>   * 急な知らせを受け、私はアメリカに飛んだ。
>   * 財布を忘れたことに気づいて、スーパーに走りました。
>




According to a classic explanation, "pure motion verbs" such as 行く, 来る, 動く, 入る
and 移動する can take both ～に and ～へ, but "motion manner verbs" such as 走る, 泳ぐ, 歩く
and 飛ぶ tend not to take ～に. Verbs in the latter group do not even need a
destination (e.g., 部屋をうろうろと歩く, プールで泳ぐ, 空を飛ぶ).

[「駅に行く」が言えるのに、「駅に歩く」と言えないのはなぜ？](http://www.alc.co.jp/jpn/article/faq/03/214.html)

That said, there are many cases where ～に is used with 歩く/走る/飛ぶ. This is
extensively discussed in [this
article](https://www.agulin.aoyama.ac.jp/mmd/library01/BD90039154/Body/link/y60u0031-057.pdf).
The author says that when the manner of a motion or a situation is more
focused than the motion itself, ～に歩く tends to be more tolerated. ～に走る/～に飛ぶ
tends to be tolerated when the cause of the action is unexpected and urgent.

>   * 考え事をしながら駅に歩いている途中で、突然友達に出会った。
>   * 急な知らせを受け、私はアメリカに飛んだ。
>   * 財布を忘れたことに気づいて、スーパーに走りました。
>

