RT Specialty has lots of markets for a variety of commercial products. We have an additional contract with them that most agencies do not which is with their commercial trucking division.
Keep in mind that Acuity is the # 1 market we have for the trucking risk but if you can't get it placed with Acuity RT is a good back up.
CARRIERS AND STATES RT REPRESENTS: https://rtspecialty.com/auto-markets-map/
Website & Submitting New Business:  https://rtspecialty.com/formerly-interstate-insurance-management/
On submissions, get with the Sr.underwriter to see if it's an online submission or if they will need acords. My understanding is that it is typically acords.
CONTACTS:
SR. Underwriter Adrienne Secriskey Cell: 814-322-6772 Office: 814-322-6772 Email: patrick.carroll@rtspecialty.com
  Director of Business Development Patrick J Carroll Cell: 908-267-6200 Office: 814-961-0725 Email: patrick.carroll@rtspecialty.com