News

May 2017 – The Sealzall system stirs up interest at the Caltrans
District 8 Innovation Fair

Caltrans District 8 recently hosted its Innovation Fair. Al Herrera, a
maintenance supervisor level II from District 11, presented his findings
for the Sealzall system. This system supports both longitudinal and
random crack sealing with increased efficiency. It is particularly
effective for longitudinal sealing, where one operator can seal cracks
at a continuous 2 – 5 mph in a moving lane closure, all from the safety
of the truck cab. Mr. Herrera and his crew have field tested the
Sealzall system for more than a year, and have been very pleased with
the system and the capabilities it provides them. The Sealzall sealant
kettle heat-up and sealing systems are fully automated and can be
monitored and controlled from inside the truck’s cab. Caltrans workers
are not on foot or exposed to direct highway traffic while on the
highway. Using the Sealzall, Caltrans has consistently sealed 5-8 linear
miles of edge joints a day, and the Sealzall machine can be utilized to
yield up to $4.0 million dollars in cost savings annually. Based on Al
Herrera’s presentation and discussions at the Innovation Fair, District
8 is now planning to use the system late in the summer of 2017.

May 2017 – Mountain Pass Road Opening (MPRO) is a hit on State Route 120 Tioga Pass

After the most significant winter snowfalls in many years, Tioga Pass
was buried in snowdrifts from 15 to 50 feet deep over several miles by
April 2016. Caltrans Maintenance must open this pass before summer. This
is a very hazardous task, with State Route (SR) 120 right next to a
steep drop-off. Maintenance workers need to keep their vehicles over the
roadway while removing massive amounts of snow, but they have no visual
indications for the road location when the snow is this deep. The MPRO
system uses GPS and an in-vehicle display, along with a highly accurate
base map, to show the vehicle operator where they are currently at
relative to the road. With AHMCT’s MPRO system, one maintenance worker
can begin cutting the snow at the right location, and the other
operators can use this accurate cut as a visual guideline. Using the
MPRO system, Caltrans operators are opening Tioga Pass in May more
efficiently and far more safely. The supervisor said they were not only
using the MPRO system, but they “love it”!

SFGATE road opening article

MPRO project

August 2011 — Deploying Python pothole patcher (PHP) at HWY 280

On August 9, 2011 the Python PHP was deployed to Caltrans District 4, Foster City, CA. Researchers Vic Reveles and Duane Bennett previously trained two Caltrans equipment operators, emphasizing the basic operation of the PHP followed by hands on training using the vehicle’s user interface controls, so personnel could drive and operate the PHP safely. Using a rolling lane closure, and covering approximately 15 miles on Highway 280, Caltrans maintenance personnel operating the PHP dispensed over 2000 lbs of hot mix asphalt patching 50 potholes in less than two hours. The PHP has dramatically improved Caltrans current pothole patching operations. The Python improves maintenance worker safety by keeping them in the vehicle and off the roadway. The PHP also dramatically improves the speed and efficiency of pothole patching practices thus improving the roadway and the mobility of the driving public.

Download: right-click->Save As...

Python PHP deployment on HWY 280


Python PHP project

August 2011 — GPS-ATD Android App beta testing

Our GPS-ATD app version 0.31  is now available in the Android Market. Beta testing was completed.

July 2011 — GPS-ATD Android App beta testing

Our GPS-ATD app is now available in the Android Market. It is in the beta testing phase.

GPS-ATD App running on various Android smartphones

GPS-ATD App running on various Android smartphones

July 2011 — Deploying Sealzall

The Sealzall machine has recently been moved from Caltrans District 11 – Desert Region where it was utilized to seal longitudinal center edge cracks on hwy I8 to District 4 – Southwest Maintenance Region. Initially the Sealzall is being used to seal longitudinal shoulder edge cracks on hwy 82, but plans are underway to extend the operation to Hwy 101 and I280.

July 2011 — Deploying Python pothole patcher

The Python PHP machine was first deployed to Caltrans District 3 – Sunrise Region and is now in the process of being moved to Caltrans District 4- Southwest Maintenance Region to fill potholes and edge drain voids on Hwy 101 and I280.

February 2009 — D5 Surveyors receive training on 3D Laser Scanner

Click here for pdf format: HDS_DeployNote2009Feb1.pdf

D5 Surveyors receive week-long training from Caltrans HQ Office of Land Survey and AHMCT, and start surveying using terrestrial 3D laser scanner. Caltrans District 5 is now ready to deploy a Leica ScanStation 2 in survey projects.

On Jan 30, 2009, Caltrans District 5 surveyors— Neal Dickey, Robert MacKenzie, Richard Majernik, Brian Meeks, and Jonathan Walsh— received training in operating a Leica Geosystems ScanStation 2 laser scanner and using Leica Cyclone point cloud post-processing software from AHMCT Research Center and Caltrans Headquarters personnel.

Deployment of terrestrial 3D laser scanning systems for surveys hit a major deployment milestone in January, when District 5 become the fifth Caltrans District trained on using this new survey tool. The photos show the survey area and Caltrans and AHMCT personnel in action.

Caltrans surveyors and management have evaluated terrestrial 3D laser scanning with support from the AHMCT Research Center. To date, District 1, 4, 5, 6, and 11 have been trained on using the Leica ScanStation 2 and Cyclone post-processing software. District 4 surveyors successfully procured and deployed a ScanStation 2, and have performed numerous scans on new and old Bay Bridge structures and other project sites. District 7 plans to use laser scanning in a rock fall study. District 1 received training from Caltrans HQ, and is applying laser scanning at a landslide site.

June 2008 — D11 deploys a 3D Laser Scanner

Click here for pdf format: HDS_DeployNote2008June23.pdf

Caltrans District 11 deploys a Leica ScanStation 2 in new survey projects. The new terrestrial laser scanning system was also featured in the D11 Survey Open House. It was well-received by survey customers, resulting in new requests for survey work using terrestrial 3D laser scanning.

On June 23, 2008: Caltrans District 11 surveyors— Chelsie Hopkins, Jason Webb, and Dave Olander— received training in operating a Leica Geosystems ScanStation 2 laser scanner and using Leica Cyclone point cloud post-processing software from AHMCT Research Center and Caltrans Headquarters personnel. Deployment of terrestrial 3D laser scanning systems for surveys hit a major deployment milestone in June, when District 11 San Diego surveyors used a Leica ScanStation 2 to survey the California Highway 805 and 95 interchange. The photos show the survey area and Caltrans and AHMCT personnel in action.

Caltrans surveyors and management have evaluated terrestrial 3D laser scanning with support from the AHMCT Research Center. In conjunction with the Caltrans Office of Land Surveys, AHMCT provided training on using the Leica ScanStation 2 and Cyclone post-processing software to District 6 and District 11. District 4 surveyors successfully procured and deployed a Leica ScanStation 2, and have performed numerous scans on new and old Bay Bridge structures and other project sites. District 7 plans to use laser scanning in a rock fall study. District 1 received training from Caltrans HQ, and is applying laser scanning at a landslide site.

For Additional Information:

Kevin Akin
Caltrans Office of Land Surveys
kevin_akin (at) dot.ca.gov (916) 227-7650
Kin Yen
Primary contact
ksyen (at) ucdavis.edu (530) 754-7401
Ty A. Lasky
Principal Investigator
talasky (at) ucdavis.edu (530) 752-6366
Bahram Ravani
Co-Principal Investigator
bravani (at) ucdavis.edu (530) 754-6130

June 2008 — D10 Posts First Message using IRIS

Click here for pdf format: IrisTrafficMgtDeployNote2008June6.pdf

On June 6, 2008, a D10 TMC operator posts the first real message to a Changeable Message Sign using IRIS (Intelligent Roadway Information System).

IRIS underlies the new Caltrans District 10 Open Source Advanced Traffic Management System.

On June 6, 2008, at 12:48 pm, the Caltrans District 10 IRIS Demonstration project hit a major deployment milestone when District 10 Stockton TMC operator Tammy Shivers posted the first real CMS message using the Intelligent Roadway Information System (IRIS) prototype. The two-page message that was posted was:

CMS Page 1:

  • NB I-5 CLOSED
  • IN SACRAMENTO
  • MAY 30 TO JUNE 9
CMS Page 2:

  • I-5 CLOSURE
  • INFORMATION
  • WWW.FIXI5.COM

District 10 TMC operators and management have been evaluating IRIS since AHMCT installed the test prototype (Release 1) in D10 on May 20, 2008. The short period between D10 beginning internal testing and their posting a real-world message is a testament to the quality of the IRIS open-source ATMS developed by Minnesota DOT, and the Caltrans-specific developments and enhancements by AHMCT.

For Additional Information

Stan Slavin
Caltrans Technical Advisory Group Leader
stan_slavin (at) dot.ca.gov (916) 653-3068
Fred Yazda
Primary contact
fred_yazdan (at) dot.ca.gov (949) 936-3462
Ty A. Lasky
Principal Investigator
talasky (at) ucdavis.edu (530) 752-6366
Bahram Ravani
Co-Principal Investigator
bravani (at) ucdavis.edu (530) 754-6130
Travis Swanston
Primary contact
tbswanston (at) ucdavis.edu (530) 752-6179

Note — This news page is disseminated in the interest of information exchange. The contents do not necessarily reflect the official views or policies of the AHMCT Research Center, the University of California, the State of California, or the Federal Highway Administration. This document does not constitute a standard, specification, regulation, or imply endorsement of the conclusions or recommendations.