もし高い丘がAからBの間にあれば、路線が丘を越えて行くようにさせるか、トンネルで丘を貫いて行くようにさせるか、あるいは丘を避けて迂回路をとるようにさせるか決めるのが重要となる。

Sentence Analyzer

もし 高い から あれば 路線 越えて行く よう させる トンネル 貫いて行く よう させる あるいは 避けて 迂回路 とる よう させる 決める 重要 なる

English Translation

If a high hill stood between A and B, it was important to decide whether the line should climb over it, pierce it with a tunnel, or make a detour to avoid it.

Furigana

もし(たか)(おか)がAからBの()にあれば、路線(ろせん)(おか)()えて()くようにさせるか、トンネルで(おか)(つらぬい)いて()くようにさせるか、あるいは(おか)()けて迂回路(うかいろ)をとるようにさせるか()めるのが重要(じゅうよう)となる。

Romanji

Moshi takai oka gaei karabi- no ma ni areba, rosen ga oka o koeteiku yō ni saseru ka, tonneru de oka o tsuranuiteiku yō ni saseru ka, aruiha oka o sakete ukairo o toru yō ni saseru ka kimeru no ga jūyō to naru.

Words

若し (もし)
if; in case; supposing
高い (たかい)
high; tall; expensive
(おか)
hill; height; knoll; rising ground; bonus points awarded to the winner at the end of a game
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
(エー、エイ)
A; a
から (から)
from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since
(ビー、ベー)
B; b
()
indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
()
space; room; time; pause
()
at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although
有る (ある)
to be (usu. of inanimate objects); to exist; to live; to have; to be located; to be equipped with; to happen; to come about
路線 (ろせん)
route; line; alignment
()
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
越える (こえる)
to cross over; to cross; to pass through; to pass over (out of); to exceed
(よう)
appearing ...; looking ...; way to ...; method of ...ing; form; style; design; like; similar to; thing (thought or spoken)
為る (する)
to do; to cause to become; to make (into); to turn (into); to serve as; to act as; to work as; to wear (clothes, a facial expression, etc.); to judge as being; to view as being; to think of as; to treat as; to use as; to decide on; to choose; to be sensed (of a smell, noise, etc.); to be (in a state, condition, etc.); to be worth; to cost; to pass (of time); to elapse; verbalizing suffix (applies to nouns noted in this dictionary with the part of speech "vs"); creates a humble verb (after a noun prefixed with "o" or "go"); to be just about to; to be just starting to; to try to; to attempt to
()
indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way
トンネル (トンネル)
tunnel; fielding error
(で、にて)
indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.
貫く (つらぬく)
to go through; to pierce; to penetrate; to carry out; to persist; to keep (faith); to stick to (principles); to maintain (independence)
或いは (あるいは、あるは)
or; possibly
避ける (さける、よける)
to avoid (physical contact with); to avoid (situation); to ward off; to avert
迂回路 (うかいろ)
detour; diversion; alternative route
とる (とる)
is being
決める (きめる)
to decide; to choose; to determine; to make up one's mind; to resolve; to set one's heart on; to settle; to arrange; to set; to appoint; to fix; to clinch (a victory); to decide (the outcome of a match); to persist in doing; to go through with; to always do; to have made a habit of; to take for granted; to assume; to dress up; to dress to kill; to dress to the nines; to carry out successfully (a move in sports, a pose in dance, etc.); to succeed in doing; to immobilize with a double-arm lock (in sumo, judo, etc.); to eat or drink something; to take illegal drugs
重要 (じゅうよう)
important; momentous; essential; principal; major
()
if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)
成る (なる)
to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...

Kanji

Readings: コウ、 たか.い、 たか、 -だか、 たか.まる、 たか.める
Meanings: tall, high, expensive
Readings: キュウ、 おか
Meanings: hill, knoll
Readings: カン、 ケン、 あいだ、 ま、 あい
Meanings: interval, space
Readings: ロ、 ル、 -じ、 みち
Meanings: path, route, road, distance
Readings: セン、 すじ
Meanings: line, track
Readings: エツ、 オツ、 こ.す、 -こ.す、 -ご.し、 こ.える、 -ご.え
Meanings: surpass, cross over, move to, exceed, Vietnam
Readings: コウ、 ギョウ、 アン、 い.く、 ゆ.く、 -ゆ.き、 -ゆき、 -い.き、 -いき、 おこな.う、 おこ.なう
Meanings: going, journey, carry out, conduct, act, line, row, bank
Readings: カン、 つらぬ.く、 ぬ.く、 ぬき
Meanings: pierce, 8 1/3lbs, penetrate, brace
Readings: ヒ、 さ.ける、 よ.ける
Meanings: evade, avoid, avert, ward off, shirk, shun
Reading: 
Meaning: roundabout way
Readings: カイ、 エ、 まわ.る、 -まわ.る、 -まわ.り、 まわ.す、 -まわ.す、 まわ.し-、 -まわ.し、 もとお.る、 か.える
Meanings: -times, round, game, revolve, counter for occurrences
Readings: ケツ、 き.める、 -ぎ.め、 き.まる、 さ.く
Meanings: decide, fix, agree upon, appoint
Readings: ジュウ、 チョウ、 え、 おも.い、 おも.り、 おも.なう、 かさ.ねる、 かさ.なる、 おも
Meanings: heavy, heap up, pile up, nest of boxes, -fold
Readings: ヨウ、 い.る、 かなめ
Meanings: need, main point, essence, pivot, key to