This course covers everything you need to know about the DDI. The course starts by giving a background of what the DDI is, the history of the DDI, and why it is getting so popular. The course will then go into details on the operational analysis, starting from a planning level analysis and developing into a simulation analysis. Participants will learn how geometric features of the DDI play such an important role in the operations of the design. Geometric design will then be taught in great detail to assist participants in understanding how to design a DDI that will minimize the quantity and severity of crashes. Participants will then learn the effects of a DDI on adjacent intersections and driveways and what the design considerations that are needed. There will be a complete section devoted to pedestrian and bicycle design in a DDI. Constructability options will be examined.

Target Audience: All transportation professionals. The course will start with the basics and progress into advanced topics that all should understand.

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Cost (US $)

Course on Tuesday, Wednesday, or Thursday
US Lower 48 – $300/person
Alaska, Hawaii, US Territories, Canada, Mexico – $335/person
Outside North America* – $500/person
Course on Monday – Add $25/person

* A minimum of three courses must be set up within a two week span outside of North America.

No courses available Friday or Saturday. Courses can be delivered on Sundays in special circumstances. Contact us for details.

Course Size

Minimum 20 participants (25 outside of North America), Maximum 40 participants

Course Length

Each course is given in a span of 8.5 hours. In general, there will be an hour break for lunch and a 15-minute break in the morning and afternoon for a total of 7 hours of learning. The typical start time is 8 AM local time, but adjustments can be made as needed.

Location

We come to you! The location must be in a room that can accommodate all participants. The local coordinator needs to provide a projector, screen, and speakers. Internet access is preferable but not required. We will provide the rest.

Special Deals

Fill 30 Seats, Get 10 Free! – Deal applicable for the course on the same day only.
Schedule a Second Course in the Same Week, Get $1,000 off the Second Course – To be eligible for this special, the second course must be within driving distance of the first course and both courses must have a minimum of 30 participants.
Schedule a Third Course in the Same Week, Get $2,000 off the Third Course – To be eligible for this special, the third course must be within driving distance of the second course and all three courses must have a minimum of 27 participants.

Instructors:

Gilbert Chlewicki, PE is the primary instructor and developed each course with his unique ability to not just have the best content, but to be able to explain the content in a way that participants can understand and apply the content immediately. The content goes well beyond any publications on the topic. Each course is constantly being updated based on the latest research and practices as well as from participants’ comments.

We do have other instructors who teach these courses as well. Our instructors are not just experts on the subjects, but are also able to teach the subject in an effective manner.

Course Testimonials

Mr. Chlewicki has taught in over 25 US states and several other countries. He consistently scores high on evaluation forms and receives great positive feedback.

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I thought it was a great experience. Great to learn about different ways to improve capacity and safety at intersections. Lots of alternatives.

Connecticut Course Attendee

Class was informative and engaging.

Connecticut Course Attendee

Very well presented information and the workshop kept my attention.

Connecticut Course Attendee

Gil was thorough and enthusiastic, which made enjoyable/relatable presentation.

Connecticut Course Attendee

Very realistic alternatives with clear pros and cons. Explains what intersections work best based on criteria. Great course. Gil was extremely knowledgeable.

Connecticut Course Attendee

Was interesting that pedestrians play such an important / significant role, seems like it’s often forgotten.

Missouri Course Attendee

Gil has a lot of real world application experience.

Missouri Course Attendee

Very knowledgeable and fielded questions effectively.

Missouri Course Attendee

It was wonderful. Instructors knew what they were talking about and were passionate about the subject manner.

Missouri Course Attendee

The concepts were clearly explained and backed up by theoretical and real-world examples.

Missouri Course Attendee

I thought it was great. I appreciate the conversation on things done well and not so well as well as general tips to keep in mind.

Missouri Course Attendee

Best documentation I have received at a seminar. It has relevant reference material, and in not merely a duplication of the PowerPoint presentation.

Massachusetts Course Attendee

Well done with many useful tools for future design problems that may occur.

Maine Course Attendee 1

I appreciated the specific design details and rationale – much better than some other presentations where the material was very abstract and theoretical. Good pictures. Instructor very well prepared and interested in the material – a huge help.

Maine Course Attendee

Great instructor, very knowledgeable.

Maine Course Attendee

The instructor was very confident in his knowledge of the subject.

Maine Course Attendee

Really enjoyed the course – covered enough detail, but not so much to get bogged down.

Minnesota Course Attendee

This is probably the best training course I’ve ever been at. Great job.

Minnesota Course Attendee

This course was a great learning experience by providing many different approaches to solve a variety of problems.

Minnesota Course Attendee

Gave a good overview of intersection and interchange options while encouraging participants to be creative and think about things more.

Minnesota Course Attendee

Great photos for examples and great technical expertise displayed.

Minnesota Course Attendee

Gilbert was passionate and a very good instructor. Good job and good class!

Nebraska Course Attendee

Thought it was an excellent presentation. Provides better understanding of intersection alternatives and appropriate application to solve design issues.

Nebraska Course Attendee

It will open my mind to not just “follow standards” and do what is right/safe.

Nebraska Course Attendee

I think Gil’s experience in the design and instruction of various intersections was most valuable. Very knowledgeable.

Nebraska Course Attendee

Diverging Diamond Interchange – Moving Everyone Faster and More Safely at a Lower Cost

Cost (US $)

Course Size

Course Length

Location

Special Deals

Instructors:

Course Testimonials

Host Course

Latest DDI Openings

I-24 @ US 60

I-80 @ Alice's Road

Links

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