1. Fig. 14 - 16: Four span railroad bridge urban grade separation, one span highway bridge grade separation, three span highway bridge grade separation. Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 1930 Format: Image Creator: Tang, Feng Tu
2. Fig. 10 - 13: Railroad bridge rural grade separation, urban grade separation, two span urban grade separation, and three span urban grade separation. Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 1930 Format: Image Creator: Tang, Feng Tu
3. Fig. 6 - 9: Plank flangeway, old rail flangeway, guarded triple penetration bit. crossing, and cross sections. Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 1930 Format: Image Creator: Tang, Feng Tu
4. Fig. 1 - 3: Approach warning sign, stop sign, diamond crossing sign and crossbuck crossing sign. Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 1930 Format: Image Creator: Tang, Feng Tu
5. Fig. 4 - 5: Flashing light signal and wigwag signal. Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 1930 Format: Image Creator: Tang, Feng Tu
6. Front cover of Grade Crossings. Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 1930 Format: Image Creator: Tang, Feng Tu
