Nigeria Highway Code
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    • Part One - Pre-Road Use Activities
    • Part Two - Road Use Activities
    • Part Three - Post Road Use Activities
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II. INTERCHANGES


An interchange is a special intersection designed to enable road users cross, enter or leave the expressway without interfering with the flow of traffic. 
  • Private drive pathways 
  • Two-lane highways 
  • Dual carriageways 
  • Expressway 
Clover Leaf INTERCHANGE
Clover Leaf
Clover leaf interchange is designed to allow turning movement off or into the expressway from four directions using loop type connections. It eliminates left turn and traffic conflicts for all movements.

Diamond interchange
Diamond
A diamond interchange has four ramps, allowing vehicles to enter or leave the main highway while flowing with the traffic. Left turns are made after leaving the expressway. 

trumpet interchange
Trumpet
Trumpet interchanges provide access to the expressway at a 'T' intersection. 

Directional interchange
Directional
Directional interchange are used where high volume traffic desire to transfer off an interchange.

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Nigeria Highway Code, 2015-2023