Biblical Hermeneutics are rules for Bible interpretation or stated another way, Hermeneutics or lens (reading glasses) to see and understand the Word of God. The Emmaus Road Hermeneutic could be summarized by John’s statement quoting Christ in John 5:39:
Jhn 5:39 (You) Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me.
On the day of Jesus resurrection, He encountered two people on the road to Emmaus, a small town a few miles from Jerusalem. As they discussed the crucifixion of Christ. Jesus told them that God had planned His crucifixion and it was necessary to complete God’s plan of Redemption.
Luk 24:25-27 Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken:
 Ought not Christ to have suffered these things, and to enter into his glory? And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself.
Jesus had told his disciples that this was God’s plan in Mat 16:13-16:
Mat 16:13-16 When Jesus came into the coasts of Caesarea Philippi, he asked his disciples, saying, Whom do men say that I the Son of man am? And they said, Some say that thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets. He saith unto them, But whom say ye that I am? And Simon Peter answered and said, Thou art the Christ, the Son of the living God.
Jesus then tells them that He was to die and then resurrect on the 3rd day.
Mat 16:21 From that time forth began Jesus to shew unto his disciples, how that he must go unto Jerusalem, and suffer many things of the elders and chief priests and scribes, and be killed, and be raised again the third day.
The apostle John records a conversation of Christ with the Jewish leaders about how the Old Testament testified of Him.
Jhn 5:39 Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me.
Paul refers to the crucifixion of Christ as God’s mystery in 1 Cor 2:7-8.
 But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory: Which none of the princes of this world knew: for had they known it, they would not have crucified the Lord of glory.
The Emmaus Road Hermeneutic shows that the Old Testament is the foundation of the New Testament and they both tell and complete the message of Christ and Him crucified. The Bible is a whole (OT & NT) is one message about salvation through faith in Christ.
Jesus and all the writers of New Testament connected the promises, prophecies and typology (types) in the Old Testament to the fulfillment in Christ and His ministry in the New Testament.
God is the author of all scripture (OT & NT). Although the writers of the Old Testament did not necessarily know what the New Testament writers would say, yet God knew and planned the linkage of the Old Testament to the New Testament through the concepts of promise, prophecy and typology (types) in the Old Testament to the fulfillment in the New Testament.
Bottom line was Jesus was the ultimate substitutional sacrifice, replacing the Old Testament sacrificial system.
Hebrews 9:24-26 For Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself, now to appear in the presence of God for us:  Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others;  For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.
John says it a different way in 1 John:
1Jo 2:2 And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
Luke’s account of the Emmaus Road conversation instructs both how to read the OT and how the OT reveals Jesus as the Messiah by foreshadowing him. Jesus expounds the Scriptures not backward by projecting Messiah back onto the OT or by reinterpreting the text, but forward by proceeding through the OT and climaxing upon himself to demonstrate that at many times and in numerous ways it foretells of both the Messiah’s suﬀerings and His glory.
The Bible’s storyline spans the history of God’s redemption from creation through progressive sequences of God’s revelation that reach their completion and fulﬁllment in the revelation of Jesus Christ.
Our goal is to believe and teach the same message as Paul which is the unified message of the whole Bible, both OT & NT.
1Co 2:2 For I determined not to know any thing among you, save Jesus Christ, and him crucified.