Qualifying Nouns with verbs question
Im using Integrated Genki Books.

So in the book to qualify nouns with verbs is (for example)
- めがねをかけているひと。
Which uses the short form for the verb before the noun...

But I found one that is using the verb stem and not it’s short form. I don’t know if both are correct or what? The sentence is this
— 京都行き電車（きょうといきでんしゃ）ps I don’t know any kanji so it will be helpful if you give me the kana too.

Question

Qualifying Nouns with verbs question
Im using Integrated Genki Books.

So in the book to qualify nouns with verbs is (for example)
    -> めがねをかけているひと。
Which uses the short form for the verb before the noun...

But I found one that is using the verb stem and not it’s short form. I don’t know if both are correct or what? The sentence is this
—> 京都行き電車（きょうといきでんしゃ）ps I don’t know any kanji so it will be helpful if you give me the kana too.

Answer

京都行き電車 is not verb + noun.
This is just noun.
This is used like this example.
Ex:私は(くるま)に のります。
     私は(京都行き電車)にのります。

Answer

京都行き電車   is a compound noun which consists of two nouns, 
”京都行き” , a noun made from a verb, and ”電車", a noun.

”行き” is a 連用形(RENYOUKEI) of a verb "行く“　(It is not a stem. The stem of 行く(IKU) is "IK")
連用形 is often used as a noun.

※ The structure is same as "駆け込み乗車“, which consists of 駆け込み（かけこみ）and 乗車（じょうしゃ）
※ 京都行き is also a combound noun.