I rode FrontRunner to Provo again this last weekend for the first time since the schedule was changed for PTC reasons. I was very interested in how trains now pass each other at Murray, Draper, Lehi, and Vineyard. Previously it was 1700 South siding, South Jordan, Lehi, and Vineyard. The original intent of the system was to have trains pass at Murray, Draper, American Fork, and the double-track section between Provo and Orem.
As you can see, the way the line operates now has departed significantly from what the line was designed for. I can't speak for the north section, but I imagine it is suffering from a similar issue. Trains are being forced to pass each other at awkward locations that make the whole process slower than things were on opening day. Particularly aggravating are the two meets at Lehi and Draper, since that is just one station apart!
Double-tracking the line needs to begin in earnest. Here is how I think it should be rolled-out:
- Orem-Vineyard-American Fork: 7.1 miles. This is the lowest-hanging fruit of them all. The bridge foundations are already in place, the ROW is already there, and this would eliminate the awkward meets at Vineyard. Once stopping at American Fork, trains could go all the way to Provo without any more interference from late trains. (A section of UP track about 1 mile long would need to be relocated to the east, but this would be easy to do since this line is so underutilized by UP.)
- North Temple to Farmington, 11.5 miles. This section would eliminate the embarrassing meets at the Centerville Siding. While I-15 travels past the FrontRunner trains have to come to a complete stop to pass each other! What's worse, is that Northbound trains that have left Salt Lake on time are often made to wait for late Southbound trains, making everything late. Again, this is low-hanging fruit since there is space for a second track along this entire length, and this is one of the areas where FrontRunner really has a chance to sell itself by zooming past stopped cars.
- Draper-South Jordan, 2.5 miles. A very easy section to double-track, with only one bridge required. Trains that used to have to wait at Draper could now proceed north to South Jordan, eliminating delays at Draper in both directions.
- Farmington-Layton, 4.3 miles. A very easy section to double-track. Only 1 grade crossing and plenty of space available for a second track. More low-hanging fruit with very visible results, since this section is also beside I-15.
- Lehi-Draper, 6.9 miles. UTA has the ROW available for a second track in this area, and the bridge over Bangerter Highway is ready to accept a second track. Much earthwork would be needed to make space for a second track, but there is also the possibility that UTA and the quarry could work together to eliminate the low-speed curves in the narrow areas. By cutting down the mountain in between (one side is already been excavated, so why not get rid of it?) UTA could cut out the 45 mph section completely by building a 1.2 mile straight section of track through where the hill once was. This would cut several minutes out of the total travel time and save much pollution and maintenance costs.
- Clearfield-Roy, 6.5 miles. Room can be made for a second FrontRunner track here by relocating the Union Pacific tracks a little farther west. No other ROW changes would be needed.
All these sections of track add up to 38.8 miles of new track. 24.3 miles of single track would remain in the system. But by placing the second track in these areas, UTA would be able to run FrontRunner trains
every 20 minutes. This is the difference between running 3 trains an hour, vs 2 trains an hour, or a 50% increase in service.
(In order to meet every train, TRAX would have to increase its service too, to every 10 minutes, or 6 trains an hour, vs 4 trains an hour, or also a 50% increase. Both increases are warranted, IMO, and without such increases in service ridership will probably remain flat.)
With 20 minute service achieved, UTA could then begin to work on the harder sections of double-track:
- Layton-Clearfield, 3.3 miles. Some new ROW will need to be purchased, but this is otherwise a short and easy section.
- American Fork-Lehi, 5.2 miles. This section will require a second bridge over the Mountain View Corridor and much ROW acquisition in Old Lehi, which will be pricey. A bridge or a trench through the area might be needed to eliminate all the grade crossings, which will be pricier but worth it.
- South Jordan-Murray Central, 6.3 miles. 1 whole mile of this section will be the Flyover Bridge at South Jordan, which will be super expensive to double-track since it was not designed for it. Other obstacles include the I-15/I-215 junction, which has several ramps and bridges severely constricting the rail ROW, and these will need to be rebuilt to provide more space. This will be quite expensive.
- Roy-Ogden, 3.0 miles. The Flyover bridge is ready for a second track, so this section will be easy to double-track.
- Murray Central-Salt Lake Central, 5.7 miles. This is arguably the hardest section of all to double-track (South Jordan to Murray being the other), since a key I-15 bridge will need to be completely rebuilt at 9th south. ROW will need to be purchased along most of the length of this section since UP cannot be relocated (there are rail yards in the way).
- Provo, 0.8 miles. ROW will need to be purchased and 3 crossings will need to be rebuilt.
That's my 2-phase approach. Get the 'easy stuff' done first, increase frequencies to 20 minutes, then work on the hard stuff as money becomes available. Once the line is fully double-tracked FrontRunner will finally become as reliable as TRAX, and only then does electrifying the line make sense.