We were coming back from late night work coming from Hinton AB on HWY 16 coming towards Edson, AB where it happened about 4 kilometers before town of Marlobo heading east.While driving I noticed on the north side of the highway green and red lightslow with in treeline, it was 1:45 am and it was very dark, the trees are bare no leaves as this is early spring here so I thought it was low flying airplane as they carry the Green and Red light,I thought I've seen an airplane flying low on the horizon through the trees.As I was getting closer I noticed these lights were not moving and they appeared bigger, it was nothing of significance to us as we thought it was perhaps some sort of tower...Finally we passed the small grove of trees and were able to have the direct visual on these lights, we've seen red, green, blue / purple light blinking sort of pulsating around quite fast,there was also a light at the bottom like a dome light rotating a beam of white/ yellow light illuminating ground and trees.We stopped the truck and parked on the shoulder looking at this thing and wondering what are we seeing, we got out of the truck to snap some photos with our cell phones,the truck was put on park idling with radio playing - local Hinton music radio station, we were in front of that thing with in 400 ft distance as it was just above the trees across the highwayright in front of us, it was very dark and the lights it was projecting were very bright sort of blinding us, we tried to catch this object on the camera but you could not see it in the lcd display.I snapped 2 pictures without flash to see if I could capture something as I was looking through the pics my friend yelled that the object moved to the right abruptly,I set up my cell phone on vide record mode and recorded the event, I finally could see the object if I zoomed on it all the way although this object was 300-400 ft in front of usfairly large maybe 6 cars wide, I could hardly see it on my cell phone cam. I recorded about a minute of video, and we honestly got a bit freaked out , but I wanted to see it move,so we stayed a bit longer and I noticed that the object drifted slowly to the left, I then thought that maybe that thing is projecting the lights maybe I should use cell cam flashto signal a couple flashes as a form of communication , I got my phone again I snapped once and nothing happened, but when I sent the next flash that thing suddenly made a high pitch 2 tone soundlasting for maybe 7 seconds, we got afraid a bit so we jumped back in the truck and decided it was time to go..., what we noticed inside the cab was a static noise of the radio,where we pulled over to investigate the object, we were listening to Hinton music station , now there was nothing but static noise, upon that we realized we justseen UFO wich interacted with the truck's radio, we took off rather fast leaving that thing behind , it did not attempt to follow us or either left, it just sat there over the trees.We were quite disturbed, it was mine and my co-workers first time witnessing ufo event especially that close , we talked about that all the way to Edmonton,we stopped in Edson to have a look at the photos and to our surprise we hardly had any photos on the phones..., I shot 4 pictures in total made about a minute long videoall I have on my phone is one picture and 8 seconds video, my friend shot over 6 photos, his phone did not record a single photo.This by far was the weirdest and most interesting experience I have ever had.