:Lerp model does not goes smooth?

Howdy!

First, check this GIF: https://gyazo.com/692e331b2b8664da939ae95d57d65977

Second, i made this script:

local Cart = workspace:WaitForChild('Train1')
local Train1 = Cart:WaitForChild('FrontCar')
local ThisCar = script.Parent
local Tracks = workspace:WaitForChild('Tracks')
local TrackNumb = 1
local Int = 0.01


repeat
    local Stop = script.Parent.StopValue.Value
    Finish = workspace.Tracks:FindFirstChild('Part'..TrackNumb).CFrame
    for i = 0,1,Int do
        local CFrameMath = script.Parent.FrontCar.PrimaryPart.CFrame:lerp(Finish,i)
        Train1:SetPrimaryPartCFrame(CFrameMath)
        wait()
    end  
    TrackNumb = TrackNumb +1
    if TrackNumb >6 then
        wait()
        TrackNumb = 1
    end
until Stop == true

Now, as you can see on the GIF, my train stops at every Brick. But i'd like it to not stop on every one, but go towards it and when nearby to it, it goes to the second, and so on the third, fourth, fifth, and so on.

People have been telling me to go on Tween, but tween does not make a train properly go make a turn. So i'm stuck to CFrame. But, now this is the struggle i got to deal with.

Any captain here so serve this poor citizen?