Hello. Generally, it is acceptable for 'shunpikes' that parallel toll roads to be tagged as trunk. See US 30 and I 70 around Bedford and Everett, PA, US 13 and DE 1 through Delaware, and US 50 in Fairfax County and Arlington, VA. Often times, these routes will see just as much, if not more traffic than the toll road. This section of Route 168 Business in particular sees ~1000 more daily traffic than mainline 168, according to AADT data.