This might be useful.
<kuid2:95230:110834:2> Airportx 701-Tram Electrical Units HD
<kuid:95230:110835> Airportx 702-Tram Electrical Units
<kuid2:58223:31776:1> Airportx 700 - Tram Bridge Track
<kuid:58223:31567> Airportx 651 (TRAM Passenger Base)
<kuid2:58223:31559:1> Airportx 643 (TRAM Service)
<kuid:58223:31566> Airportx 650 (TRAM Bridge)
<kuid:58223:31564> Airportx 648 (TRAM Interactive Station)
<kuid:58223:31565> Airportx 649 (TRAM Interactive Station)
<kuid:58223:31562> Airportx 645 (TRAM Elevated Track Rest-Base)
<kuid:58223:31563> Airportx 646 (TRAM Elevated Track Rest-Base)
<kuid:58223:31561> Airportx 644 (TRAM Elevated Track Rest-Base)
<kuid:58223:31560> Airportx 647 (TRAM Service Car)
<kuid:58223:31777> Airportx 701 - Tram Electrical Units
<kuid:58223:31778> Airportx 702 - Tram Electrical Units
<kuid:58223:31779> Airportx 703 - Tram Storage Units
<kuid:58223:31775> Airportx 699 - Tram Rest Stop
<kuid:58223:31774> Airportx 698 - Tram Bridge
There are plenty of tram and metro tracks including a substantial elevated system available for download. You can even customize bridges and track if you want to create your own assets.
These are very useful! Also, I will leave some recommendations below:
<kuid:528206:100281> SL Bridge Plate Girder 2 Track
<kuid2:101046:107023:1> Station Suspended Monorail ver 10 2T
<kuid:101046:106999> Station Suspended Monorail ver 4 2T
<kuid:101046:107005> Station Suspended Monorail ver 6 2T
<kuid2:101046:107020:1> Station Suspended Monorail ver 9 2T
<kuid:101046:107012> Station Suspended Monorail ver 7 2T
<kuid2:101046:107019:1> Station Suspended Monorail ver 8 2T
<kuid:101046:107032> Station Suspended Monorail ver 11 2T
<kuid:101046:107050> Station Suspended Monorail ver 15 2T
<kuid2:46819:28068:1> Monorail_Station
<kuid2:31293:23002:1> Monorail Power Substation
<kuid2:95230:107726:3> Monorail Station Small Double V3
<kuid2:95230:107727:2> Monorail Station Small Single V3
<kuid2:95230:107728:2> Monorail Station Standard V3
With some edits and tricks you can get them to be useful for your project.
Best,
Fineas