Talk:Mission: Long-Haul Bus/@comment-2607:FB90:6C20:6071:D541:EC93:D978:63A2-20190511112151/@comment-35819953-20190511121341

If you've completed the bridge across the river, built the sand blocker, bus stop, charge station and windmills, you've done your part. When A&G commissions items for their construction projects, their builders can take several weeks to complete the projects.

Other switch players have reported getting further in the storyline, so I think you may just have to spend a few more weeks doing other tasks.