June 27 2552 15:35
“We've made it out of the sewers and are now approaching the ruins of Tsavo Highway. The entire thing seems to be crumbling; massive chunks from the fall of the orbital elevator has collapsed onto the structure and caused most of it to collapse. We're attempting to find a good LZ for us to get beamed up. Another squad of ODST must have come this way before us- corpses of dead covenant bastards litter the grounds. Wait- I see a way up to the higher level of the highway. Get that covenant ship above the highest point of this thing and drop down a grav beam I think we might be able to get the asset on board!”
End transmission –Pvt. Gavin Williams
“Can do private, be advised I spotted a few phantom drop ships come in so expect company.”
End transmission –Capt. Drew Morris
“Some of the gates to the upper highway layer have been blocked! Give us a minute to get it open!”
End transmission –Pvt. Gavin Williams
“Covenant will be all over this cruiser's ass soon. I don’t care what you do to get that thing up here, but we sure as hell can't fly this thing so if you're screwed, we're all screwed."
End transmission –Capt. Drew Morris
“Roger that, we're on our way.” End transmission –Pvt. Gavin Williams
Desert Highway takes place in the middle of the desert some hundred miles outside New Mombasa. After the orbital elevator fell its impact caused large sand storms which came in and buried most of the highway; most pieces of the elevator toppled ontop of the highway causing it to break.
A squad of ODST’s must transport a very important engineer to the top of the highway and onto the Covenant ship, not only because what he knows could help put an end to the war, but also because he is the only one that knows how to fly the ship. It didn’t take long for the Covenant to figure out where this asset was. They sent down squads of their finest soldiers to take him out.
So that is why you will be fighting your way up a ruined highway and into the gravity beam of a Covenant cruiser.
Description:
This is mostly an escort style map, but is concidered Holdout because you must wait for something to spawn to be able to reach the destination point. This map containts plenty of holding out; you must first escort the asset to the end of the covered section of the highway then hold off hordes of Covenant while waiting for the door to open. After, you must either A.) Stay in the covered section until a ramp leading up to the destination spawns or B.) Go out and hold out on the open area of the highway. Both have their advantages and disedvantages.
Though the Covenant cruises hovering above the highway has been commandeered by a UNSC battalion, covenant troops have managed to live and either escape with a Banshee or by jumping out with a jump-pack, so think twice before walking out in the openSpawning:
Attackers’ spawns: The attackers start out in the sky bubble and instantly fall to their death. They then either spawn in this room:
and get to choose from an arsenal of weapons and equipment. Or they spawn in a room like this:
where they become a superior brute class, like a stalker or chieftain
They can also spawn on top of the cruiser to become a jump-pack brute:
or on top of the orbital elevator shards and become a sniper jackal equipped with a beam rifle and needler. 
Defenders spawn: The defenders start out in a sewage pipe that has been flooded with sand. They must make their way across a field littered with debris and dead bodies of fallen soldiers. In the rubble they may find some useful things left behind by the squad that was formally positioned there. If an attacker dies he or she will respawn in the holdout zone of the covered section of the highway, here:
That way you are at almost at all times in the middle or the action.
ASSET
To learn more about the game type ASSET click HERE
PICTURES:
Here is what you have all been waiting so patiently for:
Overview:
Overview of elevator shards:
Beginning of highway: 
More shards, rubble, and broken underside of highway: 
Cruiser and upper highway overview: 
Under crumbling tunnel: 
Weapon cache:
Machine gun turret: 
Uphill battle: 
Too late: 