Yes, a script can add a track anywhere.

Here's basically what you'd need to do:

            foreach (Track myTrack in myVegas.Project.Tracks)
            {
                if (myTrack.Selected)
                {
                    VideoTrack newTrack = new VideoTrack(myTrack.Index, "Optional Name");
                    myVegas.Project.Tracks.Add(newTrack);
                    break;
                }
            }

@jetdv and audio track? please

So you want video + audio above the current selected track?

            foreach (Track myTrack in myVegas.Project.Tracks)
            {
                if (myTrack.Selected)
                {
                    int thisIndex = myTrack.Index;
                    VideoTrack newTrack = new VideoTrack(thisIndex, "Optional Video Track Name");
                    myVegas.Project.Tracks.Add(newTrack);
                    AudioTrack newATrack = new AudioTrack(thisIndex + 1, "Optional Audio Track Name");
                    myVegas.Project.Tracks.Add(newATrack);
                    break;
                }
            }

Yes, a script can add a track anywhere.

Here's basically what you'd need to do:

            foreach (Track myTrack in myVegas.Project.Tracks)
            {
                if (myTrack.Selected)
                {
                    VideoTrack newTrack = new VideoTrack(myTrack.Index, "Optional Name");
                    myVegas.Project.Tracks.Add(newTrack);
                    break;
                }
            }

 

@jetdv It doesn't work.

So you want video + audio above the current selected track?

@jetdv
I want one for the video track and one for the audio track, to replace the native Vegas commands.The video always creating above the selected track and the audio creating below the selected track.

That's just the "guts" of the script, not the entire script. To scale it down and make it "runable":

Video Track above first selected track:

using ScriptPortal.Vegas;

public class EntryPoint
{
    public void FromVegas(Vegas vegas)
    {
        Vegas myVegas = vegas;

        foreach (Track myTrack in myVegas.Project.Tracks)
        {
            if (myTrack.Selected)
            {
                VideoTrack newTrack = new VideoTrack(myTrack.Index);
                myVegas.Project.Tracks.Add(newTrack);
                break;
            }
        }
    }
}

Audio Track after first selected track:

using ScriptPortal.Vegas;

public class EntryPoint
{
    public void FromVegas(Vegas vegas)
    {
        Vegas myVegas = vegas;

        foreach (Track myTrack in myVegas.Project.Tracks)
        {
            if (myTrack.Selected)
            {
                AudioTrack newTrack = new AudioTrack(myTrack.Index + 1);
                myVegas.Project.Tracks.Add(newTrack);
                break;
            }
        }
    }
}

@jetdv 
Worked perfectly. But when I defined a shortcut for the script, I noticed that the execution time is unfortunately slower than Vegas' native create new track function.
Can you do one more thing? I realized that when there is no trail it is not possible to create a new trail. Is there a way to make it also create a track even without selecting any tracks? (I understand that with more lines of code the script will take even longer to run.)

If no selected track, will add a video track at the top or an audio track at the bottom.

using ScriptPortal.Vegas;

public class EntryPoint
{
    public void FromVegas(Vegas vegas)
    {
        Vegas myVegas = vegas;
        bool added = false;

        foreach (Track myTrack in myVegas.Project.Tracks)
        {
            if (myTrack.Selected)
            {
                VideoTrack newTrack = new VideoTrack(myTrack.Index);
                myVegas.Project.Tracks.Add(newTrack);
                added = true;
                break;
            }
        }
        if (!added)
        {
            VideoTrack newTrack = new VideoTrack(0);
            myVegas.Project.Tracks.Add(newTrack);
        }
    }
}

using ScriptPortal.Vegas;

public class EntryPoint
{
    public void FromVegas(Vegas vegas)
    {
        Vegas myVegas = vegas;
        bool added = false;

        foreach (Track myTrack in myVegas.Project.Tracks)
        {
            if (myTrack.Selected)
            {
                AudioTrack newTrack = new AudioTrack(myTrack.Index + 1);
                myVegas.Project.Tracks.Add(newTrack);
                added = true;
                break;
            }
        }
        if (!added)
        {
            AudioTrack newTrack = new AudioTrack(myVegas.Project.Tracks.Count);
            myVegas.Project.Tracks.Add(newTrack);
        }
    }
}

@jetdv Thank you very much! Worked perfectly.

@VEGASDerek Although our friend jetdv managed to create something that solves the problem, this remains an issue that should be resolved in official updates.

This is how VEGAS has worked since the beginning of time. It is unlikely we will change this default behavior. However, we could consider some alternate new track options.

@VEGASDerek But shouldn't the shortcut's behavior be the same as right-clicking and selecting the option? Since the shortcut is a quick way to do the same function?​​​​​​​

It is quite simple the reason behind it...the right click option places the new track at the point where the right click occurred in the timeline. The keyboard shortcut will place a video track at the top of the timeline or and audio track at the bottom since it has not relevance to the mouse cursor. You're assumption that this is based on a selected track is incorrect...it is based on the location of the mouse click.

@VEGASDerek

The current audio track's right-click menu lacks "Create New Video Track",

video track's right-click menu lacks "Create New Audio Track".

Many users would like this to be improved to bring greater flexibility and freedom for Vegas.

@lan-mLMC I agree.​​​​​​​
Ps. With this script above you can do that.​​​​​​​

It is quite simple the reason behind it...the right click option places the new track at the point where the right click occurred in the timeline. The keyboard shortcut will place a video track at the top of the timeline or and audio track at the bottom since it has not relevance to the mouse cursor. You're assumption that this is based on a selected track is incorrect...it is based on the location of the mouse click.

@VEGASDerek I do not agree with this. I don't know if anyone else agrees with me, but I think that when we LEFT click on a track we are selecting it. So, if we were to do CTRL + SHIFT + Q at that moment, it should create the track above the track we selected. That's what I think, I've never seen any program just recognize that we're selecting something only when we click the right button.