This was the first step which was to be a helix, but ended up as my Thachpi loop measuring in as a 10 foot circle. I alwas though the outside track was a passing siding, but after a Google Map search it ends up as one of 3 main lines into the Long Beach Intermodel yard, perfect for one of the main yards on my layout . This outside loop on the layout ends up being a 30 foot yard lead into the Long Beach yard, something Rich would be in favor of. Once an East bound train leaves Long Beach it runs through The L A Trench that in real life is 20 miles long and 33 feet deep. Constructed so L A traffic can ride over passing trains instead of having to stop for rail traffic. once out of L A my trains run around Thachpi loop up to the Keddie Wye, pass a Rocket Assembly plant in Utah, heads pass Chicago onto the 4 main line Horseshoe curve, on to New York which is in the early stages of construction, and into Newark's Oak Island yards. The lead for this yard is 50 feet starting at Horse Shoe Curve, hence the 4th line agreed upon by the Board of Director's.