sentences:  At under 2 miles, the two highways run together concurrent with I-69W from the Mexico–US border until I-35 in Laredo, where I-69W temporarily ends.US 59 and Loop 20 continue to run together until just south of Lake Casa Blanca, where Loop 20 heads south to Mangana-Hein Road (and potentially into Mexico) and US 59 heads towards Freer; traveling in a mostly northeast direction.US 59 shares a short congruency with SH 44 in and around Freer.